Reborn in his avatar form, Jake can walk again. He is given a mission to infiltrate the Na'vi, who have become a major obstacle to mining the precious ore. But a beautiful Na'vi female, Neytiri, saves Jake's life, and this changes everything. Jake is taken in by her clan, and learns to become one of them, which involves many tests and adventures. As Jake's relationship with his reluctant teacher Neytiri deepens, he learns to respect the Na'vi way and finally takes his place among them. Soon he will face the ultimate test as he leads them in an epic battle that will decide nothing less than the fate of an entire world.