A film from the universe of How to Train Your Dragon with the age category R. A group of friends guided by the legend of an island on which there is a castle full of gold and treasures sets off on an expedition. During the expedition, they meet, among others, Night Fury and in the castle they meet Purple Death. The friends are joined by cousin Astrid who wants to prove that she is as valuable as she is. The group is followed throughout the journey by one of the best dragon hunters on the island of Berk. The film takes place a year before the first httyd film.
