خلاصه داستان : یک وایکینگ جوان بدبخت که آرزوی شکار اژدها را دارد، خود دوست غیر محتمل یک اژدهای جوان می شود و می آموزد که ممکن است موجودات بیش از حد تصور او باشند.

As the son of a Viking leader on the cusp of manhood, shy Hiccup Horrendous Haddock III faces a rite of passage: he must kill a dragon to prove his warrior mettle. But after downing a feared dragon, he realizes that he no longer wants to destroy it, and instead befriends the beast – which he names Toothless – much to the chagrin of his warrior father.