Avatar Aang asks his friends to help him honor Yangchen's Festival - an extremely sacred Air Nomad holiday that has not been held in over a hundred years.

However, cryptic visits from the spirit of Avatar Yangchen herself lead Aang to discover a jointly owned Fire Nation and Earth Kingdom refinery - operating on land sacred to the Airbenders! Is this the cause of the pollution Aang finds there, or is something more mysterious happening?

(Source: MU)

An Earth Kingdom Scholar's points of view about "family" and governing with dignity motivates Zuko to set things right within his own family. He makes a deal with Azula, releasing her from the mental institution in exchange for her help on his quest to discover the truth about their mother, Ursa. Additionally, with the help of Aang, Sokka, and Katara, the five set out on a journey towards Ursa's hometown. Tensions between Azula and the rest stir trouble and an encounter with a wolf spirit delays them even more, though as they continue, they find their own dynamic to make it all work.

(Source: MU)

In the Fire Nation, Uncle Iroh still awaits the return of Fire Lord Zuko, who is bringing home his long lost mother, Ursa, as well as her new family - for the first time since her banishment.
owever, the capital city faces a new uproar caused by the New Ozai Society, who aim to dethrone Zuko in favor of his imprisoned father, forcing Zuko to protect his family against the legacy of Ozai. Besides the political turmoil, personal drama erupts - as the Fire Lord also needs to face his ex-girlfriend, Mai.

This series rejoins Aang and friends for exciting new adventures, beginning with a face-off against the Fire Nation that threatens to throw the world into another war, testing all of Aang's powers and ingenuity.

(Source: MU)