How to Break a Dragon's Heart

Hiccup Horrendous Haddock III must embark on a dangerous mission to save his friend Fishlegs, who has accidentally sent a love letter to the daughter of a terrifying rival chieftain. To prevent a deadly execution, Hiccup has to navigate treacherous waters and face the legendary dragons of the archipelago. It is a race against time where a single mistake could mean the end for both friends.