The RUNAWAY

Hiccup has tried to flee Berk before his final trial, and this time, he succeeds. Astrid, distraught thinking that she has chased him to his death, and Stoick is on the lookout to avenge his dead son. During a routine border check of Berk's waters, Astrid, Fishlegs, and Gobber are carried out to open sea in a storm and shipwreck on an uninhabited island south of Berk's borders. What happens when they realize they need to defend themselves from a mysterious someone?