Hiccup is chosen to kill the Monstrous Nightmare to become a Viking. But Hiccup doesn't want this. Scared about the possible outcomes of the situation, he runs away from Berk with his dragon Toothless, and is presumed dead. Five years later, Hiccup is enjoying his new life by living among dragons, but what will happen when an unexpected event forces Hiccup to return to Berk?