On a futuristic Earth torn between the warring elements of Air, Earth, Water, and Fire, only one special being known as the Avatar can bring peace to the conflicted planet. The trouble is, the Avatar is an immature 12-year-old boy called Aang who would rather wander the world having fun-filled adventures than settle down and face his heroic destiny.

This second season centers around Avatar Aang and his continuous quest to master the four elements. Together with Katara, Sokka, Momo, and Appa, he journeys across the Earth Kingdom in search of an Earthbending mentor while staying one step ahead of Princess Azula!

Having survived the terrible battle with Azula, Aang faces new challenges as he and his brave friends secretly enter the Fire Nation. Their quest is to find and defeat Firelord Ozai. Along the way, they discover that Ozai has plans of his own. The leader of the Fire Nation intends to use the massive power of Sozin's Comet to spread his dominion permanently across the four nations.