While journeying to the North Pole, Aang, Sokka and Katara explore Aang's former home, the Southern Air Temple. Aang learns of his people's genocide at the hands of the Fire Nation; his anger triggers his Avatar State, which in turn alerts the world that the Avatar has returned. Meanwhile, Zuko and his uncle, Iroh, have their ship repaired at a Fire Nation port commanded by a rival, Commander Zhao.