1: The Girl in the Iceberg

When Katara and Sokka, two children of the South Water Nation Tribe, discover a perfectly preserved and mysteriously alive, girl inside a huge sphere of ice, their lives change forever. This girl is the now mythical 'Avatar', the only human being in the world who can bend all the elements: Water, Earth, Fire and Air, and commune with the spirits. Now, the Avatar must accept her destiny, and save the world.