While the rest of the Viking children in his village learn how to fight the dragons that attack them every night, Hiccup secretly makes friends with an injured dragon he names Toothless, but then another Viking finds out.
Chronicles the adventures and misadventures of Hiccup Horrendous Haddock the Third as he tries to pass the important initiation test of his Viking clan, the Tribe of the Hairy Hooligans, by catching and training a dragon.