Now chief of Berk, Hiccup works to build the peaceful dragon utopia he has long dreamed of with Toothless at his side. But when Toothless discovers he is not the only Night Fury and is drawn to an untamed, elusive mate, their bond faces new strain. As danger closes in and the hired tyrant Grimmel hunts for the secret Hidden World, Hiccup must protect both his village and the dragons he loves.