Waging a devastating war, the Fire Nation destroyed the harmonious balance among the four nations. The Air Nation isNomads are no more, and the Water Tribes and Earth Kingdom are on the verge of collapse. In such dire times, the Avatar, master of the all four elements, is expected to return bring balance to the world. But the Avatar has been missing for a hundred years. When teenagers Katara and Sokka of the Southern Water Tribe rescue a young boy...