As they worked to quell the volatile volcano threatening Dragon's Edge, the Riders unearthed disturbing signs of increased Hunter presence.

While the Riders search for answers regarding the vanishing merchants of the Northern Markets, Hiccup and Snotlout find themselves ensnared by a dragon with a penchant for hoarding treasure.

The Riders accepted the invitation to Berserker Island, anticipating a welcome reunion with Heather, Dagur, and a young face they all knew. Their gathering, however, was abruptly shattered by the outbreak of a sudden revolt.

Emerging from the tempest's fury, Snotlout found himself delivered to a people unlike any he had ever encountered – a tribe of winged women. For a fleeting moment, he believed he had arrived in Valhalla itself. The illusion, however, shatte…

Ignoring Hiccup's warnings, the twins pursue a solitary Eruptodon to its final resting place: Vanaheim. There, they discover the reason no human has ever ventured to that realm before.

Alvin, the exiled leader, was taken captive by bandits, who demanded a ransom. Desperate, they appealed to the Dragon Riders for aid, specifically requesting the presence of Thor Bonecrusher.

Ambushed by a band of Singetails, the Riders swiftly ascended, intending to drive the creatures away. But as they drew nearer, a disquieting realization washed over them.

Fleeing, the Riders made their way to Berk, where Stoick’s strategy for confronting the Flyers – one demanding a grievous cost – ignited in Hiccup a desperate search for another path.

Unexpectedly, a helpful companion reveals patterns in the Singetail's behavior – patterns that offer a path to overcoming the Flyers. Meanwhile, an overly confident Krogan commits a critical miscalculation in planning.

While defending Garff, Stormfly finds herself entangled with two venomous Slitherwings. To procure a necessary component for an antidote, Astrid must then venture into danger, risking her own life.

Ruffnut's refusal of Throk's proposal stemmed from the unbearable thought of separation from her twin. To grant her the independence she desired, Tuffnut orchestrated a deception, feigning his own demise so she might marry without such cons…

A faded entry in a forgotten diary guides Hiccup and Fishlegs back to Vanaheim, setting them on a path to aid Dagur in his search for his father, Oswald the Agreeable, who has been lost for many years.

Heather's journey to meet the man who swore he’d seen Oswald leads her into a snare, one that exacts a heavy and unforeseen toll upon the Dragon Riders.