Katara and Sokka, a brother and sister from the Southern Water Tribe, discover a twelve-year-old boy frozen in an iceberg. Katara wonders if this boy is the Avatar whom the world has been waiting for for a hundred years. Of course, his enemies in the Fire Nation have also been waiting.

Prince Zuko, a young Firebender whose mission in life is to capture the Avatar, tracks Aang down to the Southern Water Tribe village where Katara and Sokka live.

Aang and his companions fly to the Island of Kyoshi, where Aang is revered by all the townfolks. While Aang is caught up in his new celebrity status, the Fire Nation attacks and they need the help of the town's female warriors - including a brave girl named Suki - to rescue the village from going up in flames.

Aang's skills as the Avatar are put to the test when he attempts to rescue a village from a monster from the spirit world. He fails miserably, and Sokka is kidnapped in the process. But when he accidentally steps into the spirit world, he gains knowledge and experience. Will that be enough to bring peace back to the village?

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.