Book 2 Chapter 5 "AVATAR DAY"

Aang and friends stumble upon a town celebrating an Anti-Avatar Day. The villagers blame Avatar Kyoshi, one of Aang's previous incarnations, for killing their leader, Chin the Great. Aang reveals his identity and is arrested for Kyoshi's supposed crimes. Zuko disguises himself as the Blue Spirit to steal food for himself and his uncle. Iroh is not happy with what Zuko is doing, and Zuko decides it is best that they part ways. Katara and Sokka investigate and find evidence that appears to support Kyoshi's innocence. However, at Aang's trial, Kyoshi's spirit appears and recounts the events that led to Chin the Great's death: a "horrible tyrant", he was confronted by Kyoshi defending her home, who ultimately split Kyoshi Island from the mainland herself, causing Chin to die from a fall when he refused to back away from the cliff Kyoshi created. Aang is convicted but subsequently pardoned after he defeats a group of Fire Nation soldiers attacking the village, and the town changes the anti-Avatar celebration to a pro-Avatar celebration.