A hapless young Viking who aspires to hunt dragons becomes the unlikely friend of a young dragon himself, and learns there may be more to the creatures than he assumed.
Long ago up North on the Island of Berk, the young Viking, Hiccup, wants to join his towns fight against the dragons that continually raid their town. However, his macho father and village leader, Stoik the Vast, will not allow his small, clumsy, but inventive son to do so. Regardless, Hiccup ventures out into battle and downs a mysterious Night Fury dragon with his invention, but cant bring himself to kill it. Instead, Hiccup and the dragon, whom he dubs Toothless, begin a friendship that would open up both their worlds as the observant boy learns that his people have misjudged the species. But even as the two each take flight in their own way, they find that they must fight the destructive ignorance plaguing their world.
In a world with dragons, this movie takes place on the island of Berk. Hiccup, son of Stoik, wants to be a dragon killer like his dad, but his dad refuses. One night on an invasion of the dragons, Hiccup catches a Night Fury, the rarest and an unseen dragon of them all to prove to his father he is worthy. But while his father is away to find the nest of the dragons, he allows Hiccup to start training to kill dragons, and at the same time, Hiccup trains with with his newly found dragon Toothless since when he was caught, lost a part of his tail. But while Hiccup tries to persuade the other vikings that the dragons are good not bad, they have a hard time believing so.