After defeating Viggo and destroying the Dragon Eye, the calm doesn't last long as Hiccup learns the Hunters remain a threat led by a new villain who can control dragons! Now, Hiccup, Toothless and the riders must battle the Hunters like never before with the help from new and old allies. Get ready for jaw-dropping twists and turns as Hiccup finally unearths the true leader of the Dragon Flyers, and unlikely ally makes a sacrifice for the riders, and the fate of all dragon-kind is put at risk. Watch Hiccup, Toothless, and the rest of the dragon riders in the most daring seasons yet!