Wanderlust

Hiccup Horrendous Haddock the third had officially become the new chieftain to the Isle of Berk, a relatively small island planted in the freezing north. It was something everyone had needed adjusting to, but a title that was well deserved. Along with this title Hiccup had gained a new relationship with his once absent mother, Valka, and had to deal with the loss of his father, the great chief Stoick the Vast. With all of these changes, and the return of summer to an otherwise icy year, it's time to reunite Queen Eleanor, of Dunbroch with her own family once again.
All the while, away from the mighty dragons of Berk, Princess Merida has taken up much of her mother's work, while trying to keep her own old lifestyle. With the coming summer many things are set to change.

So just to be clear, spoiler warning over the events of HTTYD 2.