Instead of killing the dragon in the arena, Hiccup decides to fly away from Berk on Toothless.He finds a small island,and lives there,bartering with the people who live on a nearby island. Five years later,Stoick finds his son again. Chaos, of course, ensues.

It's some time after the end of Ice Age 4, and everything has returned to normal. Peaches has resumed chasing after Ethan, Manny's still trying to stop her, and of course Louis is still his introverted self. But he's made it his mission to tell Peaches how he feels; it's not going to be easy, but he'll make some new friends, or maybe something more, along the way who may just help.

Hiccup decides that Berk is no longer safe. He makes the call to sever all ties from his home. What will happen when he blows his cover with the village? What will the world think when he reveals his Night Fury? Hiccup sees just how important Toothless actually is. Veers off from the first movie. Expanding the beloved relationship of Hiccup and Toothless.