The day of the eclipse has arrived, and the invasion force gathers together to make last preparations. As the eclipse draws near, they launch their assault on the Fire Nation Capital and begin their long struggle with the Fire Nation Army. Will they be able to survive the battle with the Fire Nation? Meanwhile, Aang enters the Royal Palace and searches for Fire Lord Ozai.

Aang and his group finally arrive at the Western Air Temple. There, they meet a repented Zuko, who offers to join their ranks. But acceptance of their former enemy's intention is not in their plans. Zuko has a hard time trying to earn everyone's trust, however, another unexpected encounter might change his chances.