Complete story — includes the ending
The gang discovers that there have been strange disappearances in a nearby Fire Nation town during the full moon. They befriend an elderly innkeeper named Hama, who reveals that she is a waterbender from the Southern Water Tribe who had been taken away sixty years ago alongside her fellow waterbenders. She becomes Katara's mentor and shares with her the tragic story of her life as a longtime prisoner of the Fire Nation, as well as new waterbending techniques, such as pulling water out of thin air or plants. Katara later discovers that Hama is enacting her revenge by kidnapping Fire Nation civilians with bloodbending, a sinister waterbending technique which manipulates the water in a person's body to cause them great pain and take over their actions. Katara battles Hama while the rest of the group find the group of villagers locked in a cave. Aang and Sokka go back to stop Hama while Toph frees the villagers. Katara is eventually forced to use bloodbending on Hama to save Aang and Sokka. Toph arrives with the villagers, who arrest Hama. As she is led away, Hama gleefully congratulates Katara on learning bloodbending. Katara weeps while Aang and Sokka comfort her beneath the full moon.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Avatar: The Last Airbender season 3. HTML formatting and reference markers removed. · Content license