Set 1,300 years after the events of How to Train Your Dragon, dragons are now just a legend to the modern world. When a geological anomaly opens an immense, miles-deep fissure in the Earth’s surface, scientists from all over the world gather at a new research facility to study the mysterious phenomenon. Soon a group of misfit kids, brought to the site by their parents, uncover the truth about dragons and where they’ve been hiding -- a secret they must keep to themselves to protect what they’ve discovered.

Hellbent on taking over Earthrealm, Kano viciously attacks town after town with the aid of three cold-blooded Black Dragon mercenaries. Those who don’t submit are annihilated but one young man won’t bend the knee to Kano: Kenshi.