It is the Doomsday of Yule. At the end of this day, either the humans or the dragons will face extinction. Alvin the Treacherous is about to be crowned the King of the Wilderwest on the island of Tomorrow. Hiccup Horrendous Haddock the Third's Quest is clear. First he must defeat the Dragon Guardians of Tomorrow and prove that he is in fact the rightful king. And then he faces his final battle. Hiccup must fight the Dragon Furious and end the rebellion alone

It is the Doomsday of Yule. At the end of this day, either the humans or the dragons will face extinction. Alvin the Treacherous is about to be crowned the King of the Wilderwest on the island of Tomorrow. Hiccup Horrendous Haddock the Third's Quest is clear. First he must defeat the Dragon Guardians of Tomorrow and prove that he is in fact the rightful king. And then he faces his final battle. Hiccup must fight the Dragon Furious and end the rebellion alone