After a global war, the seaside kingdom known as the Valley of the Wind remains one of the last strongholds on Earth untouched by a poisonous jungle and the powerful insects that guard it. Led by the courageous Princess Nausicaä, the people of the Valley engage in an epic struggle to restore the bond between humanity and Earth.

In a countryside town bordering on a magical land, a young man makes a promise to his beloved that he'll retrieve a fallen star by venturing into the magical realm. His journey takes him into a world beyond his wildest dreams and reveals his true identity.

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.

Times are changing for Manny the moody mammoth, Sid the motor mouthed sloth and Diego the crafty saber-toothed tiger. Life heats up for our heroes when they meet some new and none-too-friendly neighbors – the mighty dinosaurs.