When Hiccup discovers Toothless isn't the only Night Fury, he must seek "The Hidden World", a secret Dragon Utopia before a hired tyrant named Grimmel finds it first.

At Santa Claus's super-secret toy-making facility, Mr. Claus entrusts his son, Arthur, to carry out an ultra-important Christmas mission.

Shy teen Hiccup must prove to his father and his village that he can still be a Viking warrior — even if he'd rather befriend a dragon than slay one.