How to fight a dragon's fury

The Doomsday of Yule has arrived, and Hiccup Horrendous Haddock III faces his final test as the Viking world teeters on the edge of destruction. He must find a way to stop a massive dragon rebellion and prove he has what it takes to be a true King of the Wild West. With the fate of both humans and dragons at stake, the young hero has to risk everything to bring peace to the archipelago.