Aang, Katara and Sokka are nearing the end of their journey to the north. Along the way, they take a detour on the Northern Air Temple, counterpart to the Southern Air Temple. Surprisingly, it isn't uninhabited. A group of people, led by an eccentric inventor, have moved up to the temple to escape the claws of the Fire Nation. At first, Aang is angry at the changes made to the great temple, but over time even he begins to like it.