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The riders escape with the help of the disposal Hotburple named Grump who Gobber bonds with and send the hunters running. Though Viggo manages to get away with Berk's gold, the dragons are still rescued, which Gobber assures Hiccup counts for something. As the riders continuously sabotage the hunters' business, Viggo offers Hiccup a truce, dividing the archipelago in half to prevent further war between them. While looking it over, the riders believe Viggo is keeping them from something on a nearby island. They investigate only to be imprisoned by a dragon-worshiping tribe called the Defenders of the Wing led by Queen Mala, who believes them to be hunters for their subjugation of dragons.
Hiccup allows himself to stand trial and face their punishments, seeing Mala and her tribe as potential allies in their struggles against the hunters and eventually wins her trust.
They learn the tribe is guarded by a lava-eating dragon, the Eruptodon, whom Mala and the others label 'The Great Protector,' but Hiccup soon realizes when the Eruptodon is captured that Viggo was using them as a distraction. Believing them to have been in league with the Hunters all along, Mala swears to kill Hiccup herself. Mala and her Dragon Worshippers have the riders at sword point, but Hiccup proposes a ceasefire and convinces Mala to trust them as they set out to retrieve the Eruptodon while Heather and the twins help stop the lava flow.
The riders learn from Mala, who joins them, that Viggo plans to use the starving Eruptodon to destroy Dragon's Edge by eating at its dormant volcano. Though the Hunters take the island, the riders manage to drive them off with the help of Mala and the Gronkles living on the Edge are recruited to safely return the Eruptodon home. Mala is finally convinced that the riders are allies of the dragons and the two groups align to defeat the hunters for good.
The twins' world travelling cousin Gruffnut comes to the Edge to pay a visit and Tuffnut is overjoyed to see his longtime hero. Ruffnut, however, is suspicious of Gruffnut's intentions, especially when he tries to fly off with each of the riders' dragons. Gruffnut is revealed to owe money to the Hunters and promised one of the riders' dragons to pay off his debt. When Tuffnut learns of the deception, Gruffnut takes his place and tries to secretly bring Barf and Belch to the Hunters, but Ruffnut recognizes him and Tuffnut defeats him in battle.
They rescue Gruffnut anyway due to his being "family," and leaves him in a Quaken's cave where he can have "a real adventure. The riders attend Berk's year anniversary, but there is little chance for celebration when they learn Viggo has placed a bounty on Hiccup's head. Hiccup is captured by everyone from two dim-witted brothers to Savage to the masked man from Viggo's auction, leading the riders and Stoick on a wild goose chase to find him. When Ryker reveals there is no prize, Hiccup manages to escape while the riders arrive and defeat the hunters. Stoick threatens Ryker to tell Viggo to call off the bounty and the masked man, seeing no chance to take Hiccup to Viggo himself, escapes.
Hiccup and Stoick admit their fault in taking on their burdens alone and promise to confide in each other as allies as well as family. Spitelout gives Snotlout bad advice at the official opening of the Jorgenson storehouse, convincing Snotlout that the others are constantly badmouthing him behind his back. Out of increasing paranoia, Snotlout begins to make reckless decisions that put the other riders in danger and at odds with him when he attempts to develop himself as a worthy leader only to crack under the pressure.
When the riders go on a mission to destroy the hunters' increased supply of Dragon Root, Snotlout at first refuses to go, but returns to save the riders when he discovers the trap that has been set.
Snotlout is reassured that he will be great, but he will follow his own path instead of his father's. While investigating a trading post, Hiccup and Heather are shocked to see Dagur alive and appearing to be aligned with the Hunters. They learn that Dagur has been working undercover trying to save Shattermaster from the Hunters, convincing the two to help him save his dragon and the captured Gronkles. Dagur leads Viggo's fleet away and swears to Heather that he will return to answer her questions, leaving his worried sister behind.
Meanwhile, Snotlout, as a result of his saving Mala's life from the Hunters, undergoes The Trials, a series of tests to prove himself as King of the Defenders of the Wing. He manages to pass two life-threatening trials but fails in the third, though Mala commends his effort and makes him a guest of honor in a celebratory feast. To deal with the riders' growing resistance, Viggo captures the Submaripper, an extremely powerful and territorial Tidal-class Dragon, to create man-eating whirlpools to block all trade routes and leave Berk to wither away in starvation.
Hiccup develops a diving bell to dive underwater and Changewing Acid to dissolve the chains, but the Hunters' interruption wakes the sleeping Submaripper. Hiccup still manages to free the Submaripper, and it rescues him just as the bell shatters, leaving Ryker to take a desperate Viggo away just as the other riders close in. Though Hiccup feels guilty for driving Viggo to make such a move, Stoick expresses confidence that he and the others will always be able to stop him.
It is now the time of Midnight Sun — straight daylight for two weeks — and the riders and people of Berk have begun to show random and hilarious symptoms of sleep deprivation, including Astrid being deliriously happy, Heather lacking coordination, Fishlegs being paranoid, Snotlout random mood swings, and the twins hallucinating.
Hiccup wants to take the chance to enact revenge on Viggo for his underhanded attack on Berk without a plan, but is caught up investigating and surviving the aggression of a small pack of new dragons and their leader that have driven the Hunters from their observation post. Thanks to Toothless, Hiccup develops a plan to divide and trap the newly christened 'Shadow Wings' one by one, reminding him of the importance of teamwork and strategy, and returns to Dragon's Edge to join the riders in a well-deserved nap in the Edge's basement levels.
Dagur returns to the Edge claiming to know the location of Viggo's gold stores, and joins the riders on a mission to take back Berk's gold. The rush of events leaves Heather torn between her loyalties to the riders and wanting to join her brother on his current journey to find their missing father Oswald the Agreeable and rebuild the Berserker Tribe. The island where the gold is stored turns out to be empty save for strange looking ruins, and the others are captured by Viggo while searching.
Heather, Fishlegs, and Dagur face difficulty saving them due to Viggo's dragon-proof ships until Heather and Dagur work together to take down the fleet. The riders return to the island and reclaim the hidden gold, and Heather finally decides to go with Dagur to find her father. The Defenders of the Wing contact the riders for their aid in delivering an Eruptodon egg to the nesting site inside their island's volcano to hatch before it hardens to stone. Hiccup and Fishlegs face continuous difficulties working together to deliver the egg, and things are made worse when a pack of wild Fire Terrors inhabiting the cave kidnap the egg.
Mala attempts to retrieve the egg herself, but Hiccup and Fishlegs regain their synergy and realize the Fire Terrors are there to safely bring the egg to the nesting ground without human interference. The three trust the Fire Terrors to take the Eruptodon egg and it safely reaches the nesting ground where it is bathed in the lava. Tuffnut breaks his beloved mace trying to break the Hunters' newest chains, and the twins go to the Hunter-swarmed Northern Markets to fix it.
Using their 'twintuition,' the twins follow the repaired and stolen Macey to find a hidden hunter operation called 'Project Shellfire. Tuffnut learns to put the needs of the team before his own and saves the others by sacrificing his Macey and freeing the others. The twins hold a funeral for Macey back on the Edge, where Tuffnut reveals stolen schematics that leave the riders worried for what 'Project Shellfire' entails. A freak lightning storm hits the Edge and while trying to rescue the dragons from the pens, Astrid looks into a stray bolt and ends up blinded. She joins the riders in searching for the dragons who were scared off by the storm, but her stubborn and fiery attitude makes things tough when they run into the aggressive and still untrained Triple Stryke.
Fearing the possibility her condition may be permanent and her Shield Maiden days are over, Astrid still manages to use her other senses to figure out the Triple Stryke's weakness and finally train it. Astrid gains her sight back thanks to Gothi and she and Hiccup enjoy a perfect moment together, finally beginning their relationship. After months of planning, Hiccup has come up with a fool-proof plan to defeat Viggo once and for all and finally reclaim the Dragon Eye. The riders and their allies storm his base, only to find it in ruins along with an injured Viggo. He reveals that Ryker has taken charge of the Hunters and offers to surrender the Dragon Eye in return for Hiccup's help in stopping Ryker, but escapes during an attack on the Defenders of the Wing, leaving the riders with the baby Eruptodon in their care.
When the riders find Ryker, he tells them that Viggo is setting them up and he can give them the Dragon Eye as the Berserkers are attacked by the Shell Fire, a giant sea dragon equipped with Hunter weaponry. Just as Hiccup is left without any ideas on what to do, who to trust, or even how to handle his developing feelings for Astrid in the midst of growing danger, Viggo returns and offers the Dragon Eye as proof of his word and offers an equal alliance to bring Ryker down.
Even with the Eye returned, Hiccup and the others still refuse to trust Viggo and imprison him just as Ryker arrives with the Hunters' fleet. The riders find out the Hunters are forcing the Shell Fire to attack but are unable to get close as the attacks trigger the Edge's volcano. Hiccup rescues Viggo from his burning cell and agrees to work together to stop Ryker by using the Submaripper, the Shell Fire's natural enemy, to destroy the fleet while the Defenders' baby Eruptodon helps control the volcano's lava flow. The Shell Fire is freed and Ryker is consumed with the fleet by the Submaripper, while Viggo turns on Hiccup threatening to kill Astrid in exchange for the Dragon Eye, but Hiccup throws the Eye into the volcano and Viggo rushes to his doom chasing after it.
Hiccup and Astrid realize their relationship compromises their mission and promise to remain professional as the other riders finally learn their secret cementing their relationship. Just as they leave, however, the volcano erupts. Dragon's Edge has been beset by small eruptions in the month following the Riders' victory over the Hunters, and with nothing left for them in the outlying islands, the Riders are forced to make the heavy decision to return to Berk.
Hiccup and Fishlegs develop a mixture of Deathsong amber and Gronkle Iron to stop the lava bursts, but while gathering materials, Hiccup and Astrid discover an older Garff mortally wounded, hinting that the Hunters, who are now led by the masked man who tried to abduct Hiccup and has the ability to control dragons, are continuing activity. Working together with the Gronkles and Quakens of Dark Deep, the Riders manage to stabilize the volcano, and decide to hold off on returning home to stop the Hunters once and for all.
Astrid faces difficulty choosing a betrothal gift for Hiccup when word from Johann comes in that traders are disappearing from the Northern Markets. Fishlegs believes it to be related to "The Curse of Tears," and when Hiccup's own betrothal gift for Astrid is stolen, he and Snotlout discover it to be real when they and the thief are pulled under the sands by a treasure-hoarding dragon which they call a Sandbuster , and are forced to work together to survive its wrath.
Guided by a map to the "Treasure of Tears," Astrid and the others manage to rescue the three and Hiccup gives his gift to her, but their moment is spoiled when they discover Snotlout recovered Viggo's sword from the Sandbuster's lair. The Riders are invited to Berserker Island where, to their shock and Snotlout's indignance, Dagur has made Gustav a Berserker apprentice. Just as they are about to celebrate his graduation, Savage and a faction of Berserkers start a revolt and imprison Dagur and the dragons. Snotlout and Gustav work together to free Dagur, but bit by bit under the gravity of the situation and Snotlout's pressure, Gustav's confidence wanes until he admits his cheating while under Dagur's tutelage.
The riders and Berserker siblings battle, and despite Savage capturing Heather, still manage to defeat him, and Dagur, admitting Gustav's apprenticeship was faked to relieve Berk of him for a while, honors Snotlout with a Berserker trophy, though he purposefully gets his name wrong. Snotlout's typical repulsive attitude forces him to flee the Edge after angering Astrid, and is caught in a storm only to be saved by an amazonian tribe called the Wingmaidens, who plan on making him a part of their sacred stew out of their intolerance towards men.
Astrid, Ruffnut, and Heather infiltrate the island to save him but in the process learn of the Wingmaiden Tribe's purpose and Windshear's origins in that they raise infant Razorwhips to protect them from being eaten by the males. Snotlout in turn is nearly killed by the aggressive female Razorwhips but is saved by the Riders and Wingmaidens who in the end celebrate their newly formed alliance, and Snotlout learns a lesson in etiquette.
Now too aged to fulfilled its duties, the Defenders' Eruptodon passes its mantle of Great Protector to its child and leaves for Vanaheim, the final resting place of dragons that no human has ever seen. The twins disobey Hiccup's orders and follow the Eruptodon to Vanaheim to complete their Viking travel guide, leaving all the Riders stranded on the island and unable to leave thanks to the Sentinel dragons guarding it, which have developed a counter-defense for every dragon.
Using Mala's advice to look at things differently, Hiccup learns to use the Sentinel's behavior and abilities to his advantage and with help from the Eruptodon, manage to escape, and Hiccup destroys Tuffnut's guide to ensure that no other human will discover Vanaheim.
A pair of Outcasts travel to the Edge asking for the aid of Thor Bonecrusher, Fishlegs' alter ego, to rescue Alvin the Treacherous from a band of bandits seeking large amounts of Ice Tail Pike fish for the Hunters. Fishlegs allows Snotlout to hypnotize him into Thor once more, but their precaution of making Thor more "anti-heroic" backfires when Thor ends up taking charge of the bandits, making them much more formidable.
Snotlout manages to undo the hypnosis, but Fishlegs pretends to be Thor long enough for the other Riders to swoop in and rescue them and Alvin.
In an attempt to free their dragons all of the group apart from Hiccup get trapped by the dragon. Funeral by the Sea 4. Fast moving subjects are not a concern. Black as Death 2. Apache Death 4. The peace with the dragons has put Gobber out of business as a weaponry blacksmith.
Meanwhile, the Hunters, now co-led by the masked man Krogan and a still-living Viggo, make preparations for their next move. Hiccup and Astrid leave together on a supply run against strong protest from the other Riders. In their absence, the Edge is attacked by a group of Singetails, which the others discover are being ridden by the Hunters and led by Krogan and his Titan Wing Singetail. Even Hiccup and Astrid's return does nothing to even the odds and things become worse when Fishlegs is separated from the group, though manages to return with help from his old friend Darkvarg.
In the end the group is forced to abandon Dragon's Edge and seek shelter with the Defenders of the Wing, where Hiccup resolves to regain the others' trust after it is revealed he is building a new Dragon Eye, while Viggo attempts to reclaim the original one from the Edge's volcano.
The Riders are still recovering on the Defenders' island when the Dragon Flyers appear again, taking advantage of Hiccup's empathy towards dragons and forcing them to retreat once more to Berk. Stoick and Astrid try to convince Hiccup that the Singetails must also be treated as the enemy and potentially sacrificed for their victory, but Hiccup remains firm on their innocence and is left lost while the rest of Berk prepares for war.
To try and find an alternate method to victory, Hiccup and Toothless travel alone to Storehouse Island to study the Singetail and find behaviors that will give them an advantage in battle, but this attempt quickly leaves Hiccup at its mercy. Hiccup ends up being rescued by Spitelout, who has been staying on Storehouse Island for months plotting to capture a Singetail for revenge on their attack before. With Spitelout's help, Hiccup discovers weaknesses in the Singetails' behaviours while the Riders, Stoick, the A-Team, and the Berk fleets launch a preemptive strike on Dragons' Edge where the Hunters are.
The Berk forces are quickly put on the defensive and Krogan takes the chance to launch all his Dragon Flyers against them, which ultimately leaves them defenseless when Hiccup returns to turn the tide. The Riders finally reclaim the Edge, but Astrid discovers Viggo is still alive and has recovered the Dragon Eye, but Hiccup is prepared as his new Dragon Eye is nearing completion.
Garff's predatory instincts begin to emerge as the Riders are in the middle of repairs, convincing them that now may be a good time to find him a new home. Fishlegs believes he has found the perfect candidate, but it turns out to be home to Slitherwings, venomous serpentine dragons that poison Stormfly as she defends Garff to trigger strange wild behavior. Though Astrid is poisoned herself to gather the venom needed for the antidote, it proves ineffective on Stormfly, which turns out to be due to her never being poisoned and instead is grieving over the loss of Garff.
The Deathsong is soon revealed to be alive and gains the chance to escape with the Riders thanks to Stormfly's new blinding light shot, and the Riders find him a more suitable home. Throk comes to the Edge with the life debt he owes Ruffnut from the battle with the Flyers having turned more romantic, but Fishlegs steps in when he shows his courting ways to be outdated. Feeling he may be denying his sister a chance at lifelong happiness, Tuffnut uses a visiting Changewing on migration to fake his death and allow Ruffnut to go with Throk, but Ruffnut refuses to move on by painting her brother's image on the belly of a Changewing she names Snuffnut and Throk refuses to leave without her and attempts to tame Snuffnut on his own.
Eventually the Riders save Throk, Tuffnut reveals his lie, and the Changewings are diverted away, and Throk decides to leave understanding that the Thorston twins are better together. The Berserker siblings continue the search for their father and though each failure only spurs Heather's obsession, Dagur is worried the search will lead to her doom. He asks for Hiccup's help in deciphering Oswald's diary, which contains a picture of a massive dragon skull that leads them back to Vanaheim.
Meanwhile the twins, Snotlout, and Astrid search for Chicken, who has gone missing, and find she has started a new family with a wild rooster. The search for Oswald doesn't end on a happy a note, with Dagur only finding his remains and a last message to him and Heather, though he continues his father's work by helping the Sentinels defend Vanaheim from the rogue Grim Gnasher dragons, and leaves satisfied that his father passed proud.
Heather and Johann travel to the Northern Markets when the latter finds word of a man who has claimed to have seen Oswald the Agreeable alive. This, however, turns out to be a trap by Krogan and the Hunters, who capture Windshear and demand the gem on Heather's belt, a lens for the Dragon Eye, in exchange for her life.
Johann convinces Heather to go through with the trade and though Krogan attempts to double cross her with a fake key, they are saved by Hiccup, the Riders, and Dagur, who finally reveals the truth of Oswald's fate and grants her closure. Meanwhile, Krogan and Viggo obtain the lens, setting the true mastermind behind the Hunters, Johann, one step closer to finding the King of Dragons.
In order to complete the Dragon Eye and discover the location of the King of Dragons, Johann needs more lenses while Hiccup still needs gemstones to complete his Dragon Eye 2. Continuing his ruse as their ally, Johann suggests taking a trip to the Northern Market with Hiccup alone and that he bring both his Dragon Eye 2 and all of his lenses. Despite Johann's attempts, Ruffnut and Tuffnut insist on accompanying them. During the trip, they are ambushed by hunters, but the twins rescue Hiccup and Johann and deduce that the only way the hunters knew they'd be there is if there was a mole within their group.
Johann is able to distract the twins and lead Hiccup to the Sandbuster's lair, where he reveals his deception and demands that Hiccup hand over the lenses. However, Hiccup had already deduced Johann was the mole thanks to the twins and is able to escape thanks to Toothless.
Angered at the revelation of Johann's betrayal, Stoick destroys everything from Johann's last shipments, including food and medicine. Despite Gobber and Hiccup's insistence, he is unwilling to trust any new traders that come to Berk. Hiccup and Stoick leave Berk to gather willowbark for medicine with tensions steadily flaring between them, but they discover that each island they go to is on fire and its willowbark destroyed.
They realize that they are being sent on a wild goose chase and their absence leaves Berk vulnerable to an attack by Krogan, who proceeds to take over Berk with his Flyers. By working together, Stoick and Hiccup are able to free the Riders and their dragons and repel Krogan's invasion. The Riders host a meeting on Defenders of the Wing Island to discuss the threat Johann poses, however, Dagur and Mala constantly disagree with each other's ideas. Through Ruffnut and Tuffnut's mediation, Dagur and Mala actually get along and develop a mutual attraction for one another.
Meanwhile, Hiccup and Snotlout travel to Wingmaiden Island to escort Atali to the meeting, where Atali leaves her second-in-command, Minden, in charge of the island, though Minden is upset at not being allowed to attend the meeting as well. When a fire breaks out on the other side of the island, Minden orders all the guards to put it out, leaving the Wingmaidens defenseless to a surprise attack from the Flyers, resulting in Atali being injured and knocked out.
Feeling guilty over her mistake, Minden, with Snotlout's aid, recovers the hidden Dragon Eye lens on their island, which the Flyers have come for. After her repeated failures, Minden loses hope and confidence in herself and quits being a Wingmaiden, but is inspired by Snotlout not to give up. Using the baby Razorwhips, the Wingmaidens defeat Flyers. After learning his ancestors were dragon hunters who killed off the Dramillions, Fishlegs sets out to Dramillion Island with Astrid against Hiccups wishes to find and help protect the Dramillions from harm.
Before setting out, he remembers his dragon scouts are coming and leaves the twins to look after them. After arriving, he immediately finds one and tries to train but discovers it is very aggressive and has the unusual ability to mimic the fire blasts of other dragons, such as a Gronkle's lava blast and Nadder's magnesium fire breath. While searching the island for more, they discover a group of hunters, who are following the teachings of his ancestor, Ingard Ingerman in trapping Dramillions and using them to help train new recruits.
When the hunt begins, Fishlegs and Astrid combine Meatlug and Stormfly's fire to destroy the shackle that grounds the Dramillion. Though they realize that they won't have enough time to save them all, the Dramillions learn the technique to destroy the shackles themselves and are able to free each other. While this is happening the twins and Snotlout teach the scouts some of their 'ways' and lose track of them. Gruffnut returns to the Edge, insisting that he has changed and is there to run Ruffnut and Tuffnut through the Thorston coming-of-age family trials that will allow them to fully join the family.
However, he states that they must compete against each other, as only one can prevail. Despite their competition through the three challenges, Ruffnut decides to save Tuffnut instead of completing the final challenge, which Gruffnut reveals was the secret, fourth challenge: Though he leaves with a seemingly empty chest, it is revealed to secretly contain a Dragon Eye lens, though Gruffnut remains ignorant to its significance.
While wondering what to do with loads of scrap metal, Dagur and Mala arrive on the Edge to announce that Dagur has completed Mala's king trials and are to be wed. After hearing this, Astrid starts to think that Hiccup isn't interested in her anymore since they are not as publicly affectionate as Dagur and Mala and begins to question her relationship with him. After deciding that the Armowing will make the best use of their spare scrap metal, Hiccup, Astrid wearing Hiccup's Betrothal necklace , Snotlout, Fishlegs and Dagur go to the island to find the dragon.
After landing, Dagur asks Hiccup to be his best man at the wedding while Astrid becomes annoyed that Hiccup hasn't noticed her wearing his betrothal necklace. After the Armorwing appears, Hiccup notices a Dragon Eye lens on its back. Krogan and his Flyers arrive to take and lens and succeed after the Riders choose to instead evacuate the injured Armorwing rather than pursue Krogan. Astrid apologizes to Hiccup for her anger and behavior and the pair reconcile. While visiting Wingmaiden Island, the Riders get to witness the ceremony where newly hatched baby Razorwhips choose their Wingmaidens.
One baby ends up choosing Ruffnut, whom Atali insists must become a Wingmaiden. Though Ruffnut struggles with the tasks to care for her Razorwhip, named Wingnut, she only succeeds thanks to Tuffnut's secret assistance. Despite Atali's encouragement, Ruffnut is certain that she cannot be a Wingmaiden and that Wingnut is better off without her.
When Flyers attack, Ruffnut rescues Wingnut and uses her newly learned Wingmaiden abilities to help repel the Flyers' attack. Seemingly accepting that Ruffnut's place is with the Riders, Wingnut accepts Atali as its new Wingmaiden and caretaker. After Johann believes he has found the location of a Dragon Eye lens in a cave, he sends Viggo in to find it. While down there, Johann and Krogan decide that Viggo is no longer useful and collapse the cave entrance leaving him trapped with a Monstrous Nightmare.
Later, Hiccup receives a Terror Mail supposedly from Stoick saying that he has found a Dragon Eye lens and to meet him alone. When he arrives, he realizes that Viggo is the one who sent the message and Viggo tells the story of his betrayal and asks for Hiccup's help. Hiccup refuses, but Viggo reveals that he has poisoned Toothless with Red Oleander, and that Toothless will die in three days if they do not recover an antidote from Johann. Using a Skrill as a diversion, Hiccup and Viggo enter their headquarters where Viggo betrays Hiccup to earn favor with Johann and Krogan once more.
However, this is all part of their plan and Hiccup and Toothless escape their cell and rendezvous in Johann's Quarters, only to discover that Johann had moved the Dragon Eye to another location. Johann and Krogan realize Viggo's deception and a fight ensues, resulting in Viggo sustaining lethal injuries before rescuing the Skrill and reuniting with Hiccup. Viggo reveals that Red Oleander is not harmful to dragons and that he had no intention of poisoning Toothless, having developed a deep respect for dragons after a Monstrous Nightmare saved him from the cave in.
He stays behind to fight off Johann's men with the Skrill, giving Hiccup and Toothless time to escape. He does not survive. After a battle with the Flyers, the Riders discover remnants of Deathsong amber underneath a Singetail's wing, leading them to deduce that Krogan is using a Deathsong to lure and capture Singetails for his Flyers. Worried, the Riders quickly check on Garffiljorg while the others take the injured Singetail back to the Edge for recovery.
They discover Garff safe and unharmed, but decide that they must liberate the Deathsong and cut off Krogan's supply of Singetails. Seeing their fortification, they decide to return with reinforcements, but Garff flies in to help the Deathsong upon hearing its cries, resulting in his capture. Meanwhile, the wounded Singetail wakes up on the Edge and despite Fishlegs' attempts to care for it, it escapes and Fishlegs and Meatlug follow it.
After making a plan, they release the captive Singetails only to find the dragons turning on them and forcing the riders to fall back in a cave with no escape. While following the wounded Singetail to the same island, Fishlegs find a hatchery of Singetail eggs and realizes that the Flyers are breeding Singetails. In the cave, Hiccups finds Garff while Fishlegs brings the Cavern Crasher to help dig a new exit and move the Singetail eggs to safety.
Once out of the cave, the Riders destroy the Flyers' facilities and free the Singetails. Stoick is attacked in one of his routine border checks.
He is rescued by the A team but is left in a comatose state as a result of his injuries. Hiccup is pressured to take up the temporary role of being chief in Stoick's absence, but Hiccup blames himself, believing that if he had never shot down Toothless in the first place, his father never would have been injured. Going from this, the others begin theorizing how different their lives and Berk would be had things gone differently. Later, an injured Heather and Windshear return from Vanaheim with dire news.
Learning that several Flyers have followed her to Vanaheim, Heather arrives on Berk and informs the Riders. Hiccup, still worried about his father, is reluctant to leave Stoick alone and go to Vanaheim. Stoick momentarily wakes up to help him make the right choice. Before leaving, Alvin arrives with reinforcements to help keep Berk safe while Stoick is recovering.
After arriving, they find the Sentinels seemingly dead and interrogate a remaining Flyer, who reveals the rest of the Flyers are on their way to inform Johann of Vanaheim's location. Top Reviews Most recent Top Reviews. There was a problem filtering reviews right now.
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