On a lush planet called Pandora live the Na'vi -- beings who appear primitive, but are actually highly evolved. Because Pandora's environment is poisonous, human-Na'vi hybrids, called Avatars, are linked to human minds, allowing for free movement on Pandora. Jake Sully (Sam Worthington), a paralyzed ex-Marine, is made whole again through one such Avatar, and falls in love with a Na'vi woman (Zoe Saldana). As his bond with her grows, he is drawn into a battle for the survival of her world.