Hiccup, Gobber, and the Viking kids are back to battle a mysterious dragon that no Viking has ever seen.

Join Hiccup and his brave viking friends as they battle surprising new enemies in ten fun-filled animated adventures based on the hit movie How To Train Your Dragon.

Hiccup, a young Viking, aspires to become a dragon slayer, but upon capturing a dragon he cannot kill it and befriends it instead; Hiccup and Toothless must protect the peace when they find a cave that is home to hundreds of wild dragons; after being targeted by Grimmel, the Dragon Riders search for a place where the dragons can be safe from hunters and trappers; as Berk prepares for the holiday season, the resident dragons all inexplicably disappear;...