Hiccup Horrendous Haddock III and his Night Fury named Toothless end up in a strange world not like their own. After resting in a cave after flight, they walk into a portal that leads them to a kingdom called Niflhein which is ruled by the recent king named Jack Frost. After a small mishap, Hiccup finds himself in a situation that he cannot get out of. (A Hijack Fanfiction)