.
Under the disguise as Fire Nation citizens, Aang gets caught and enrolls in a Fire Nation school, where he is able to learn more about the fire nation. And bonds with some of the the fire nation kids and teaches them about unleashing their inhibitions and having a wicked dance party.
Aang awakes to find himself crippled onboard a stolen Fire Nation ship with the group, Bato, and Hakoda. Aang is shocked to discover that following his injury in the second season finale in Ba Sing Se, the world believes him to be dead. After a great deal of persuasion, Aang agrees to keep his existence a secret. Zuko and Azula sail home in peace, but Zuko secretly fears being rejected by his father, Fire Lord Ozai.
Sokka and Zuko travel on their hot air balloon to the Boiling Rock, the maximum security prison of the Fire Nation, in hopes of saving Sokka’s father, Hakoda, who was captured in the failed invasion. After discovering Suki, they learn that there are no Water Tribe prisoners in there, Sokka, Zuko, and Suki plan to escape in the “Coolers”. Another Fire Nation prisoner named Chit Sang escapes with them. Sokka, Zuko, and Suki then stay behind to rescue Hakoda, while Chit Sang and his prisoner friends escape in the Cooler. But the escape fails and Chit Sang is returned to the prison.
Hadoka arrives at the Boiling Rock, and Zuko and Sokka make new plans to break out of the prison with him, Suki, and another prisoner. Zuko is captured and interrogated by his old girlfriend, and the arrival of Azula and company to the prison causes tension to rise. As the escape plans fall into place, a shocking twist leaves Azula none to happy with her two closest friends.
Katara sets out to confront the fire nation soldier who killed her mother. But what will she do when she finds him?
Aang and the gang finds that a play was written about their adventures, and is being performed on Ember Island.
When Aang reveals his decision to wait until after the comet passes to confront Ozai, Zuko explains the Fire Lord’s plan to use the power of Sozin′s Comet to destroy all of the Earth Kingdom; forcing Aang to attack the Fire Lord before the comet’s arrival. During the night, Aang is drawn towards an island, prompting the group to find a tracker as an attempt to locate him. The Fire Lord crowns himself Phoenix King and Aang awakens on an island not knowing where he is.
While on the island, Aang seeks guidance from his past lives, but is not pleased with what he is told. The island, in fact, turns out to be a lion turtle from whom Aang is given the guidance he had been seeking. After the tracker is unable to find Aang, the rest of the group decide they must find Iroh. When they find Iroh, the group meets the Order of the White Lotus, an order which transcends the division of the four nations. After a discussion with Iroh, the team decides to split up; Sokka, Suki, and Toph head to stop the Fire Nation’s air fleet, the Order goes to reclaim Ba Sing Se for the Earth Kingdom, and Katara, Zuko, and Appa head to defeat Azula.
Zuko and Katara confront Azula, but she challenges Zuko to a one-on-one Agni Kai. Zuko is wounded by a blast of lightning while protecting Katara. Meanwhile, Aang finally confronts Ozai but finds himself overwhelmed by Ozai’s comet-enhanced Firebending. Sokka, Toph, and Suki attempt to halt the fleet but are soon separated, while the Order of the White Lotus battles for Ba Sing Se.
During the battle, Ozai manages to slam Aang into a sharp rock, which stabs Aang’s scar. Aang releases the seventh chakra and enters the “Avatar state”. Though Aang easily overwhelms Ozai, he refuses to kill him. Aang instead uses Energybending to strip Ozai of his Firebending powers. The Order of the White Lotus manage to liberate Ba Sing Se, and Katara manages to defeat Azula and heal Zuko. During his coronation, Fire Lord Zuko promises to aid the world in reconstruction.