The Fire Nation is waging a seemingly endless imperialist war against the Earth Kingdom and the Water Tribes, following the genocide of the Air Nomads one hundred years ago. Aang, the current Avatar, must master the four elements (Air, Water, Earth, and Fire) to end the war. Along the way, Aang and his friends are chased by various pursuers: banished Fire Nation Prince Zuko, along with his uncle and former general Iroh, and Admiral Zhao of the Fire Navy.