Synopsis: The group recovers from the fall of Ba Sing Se, and travel to the planned invasion site. On the day of the solar eclipse, Aang's group and a smaller band of warriors launch a smaller invasion, which ultimately fails. Zuko confronts his father and defects from the Fire Nation. After a series of events, he manages to gain the trust of the protagonists and becomes Aang's firebending teacher. Aang and Zuko unlock the true secrets of firebending from the ancient 'Sun Warriors', Sokka and Zuko later travel to a Fire Nation prison called the Boiling Rock to rescue Sokka's father and Suki, a warrior from Kyoshi Island.