This animated sequel continues the story begun in the blockbuster movie How to Train Your Dragon. When we last left best friends Hiccup and Toothless, they'd united the dragons and Vikings and brought peace to Berk. Now the two of them are off to new places, exploring uncharted territories. Their mapping expedition leads them to a secret cave where hundreds of wild dragons live. These previously unknown beasts are under the care of a mysterious Dragon Rider. However, the "Dragon God" Drago Bludvist wants to rule the world with an iron fist. Hiccup, Toothless, and the rest of the dragons and Riders must prove their courage by defeating this new threat so that Hiccup can take over for his father as leader of Berk. But Drago's ruthlessness and mighty dragons will make it anything but easy.