The time flies. Life on New Berk goes on. Astrid and Hiccup couldn't be happier. They're now loving parents of two amazing children- future chiefs of New Berk and protectors of the hidden dragon world. Unfortunately, the children don't see themselves as good successors of that great responsibility. The son can't create a bond with dragons (which is kind of problematic). The daughter is really bad with any social skills (which are quite useful when you're a chief). Will they overcome the obstacles? Will they follow their parents' footsteps? Or maybe they'll give the beginning of a completely new adventure?