On the rugged isle of Berk, a Viking boy named Hiccup defies centuries of tradition by befriending a dragon named Toothless. However, when an ancient threat emerges that endangers both species, Hiccup's friendship with Toothless becomes the key to forging a new future. Together, they must navigate the delicate path toward peace, soaring beyond the boundaries of their worlds and redefining what it means to be a hero and a leader.