Berk's town appreciating its alliance is currently preparing for its annual winter holiday of Snoggletog. When all the dragons, except Toothless who needs Hiccup to help him fly for a certain reason, But, that spirit is jeopardized. While Astrid tries to overthrow the event, Hiccup decides to build Toothless a new user friendly to let him fly only to possess the drag on simply take. Since the holiday approaches, Hiccup finds himself swept up to master the dragons' secret that the way that is difficult also to obtain a way to bring them home.