While planning to celebrate Yangchen's festival, Aang is visited by the spirit of Yangchen herself who leads him to discover a refinery on land sacred to the Airbenders that may be causing the pollution he finds there.
While planning to celebrate Yangchen's festival, Aang is visited by the spirit of Yangchen herself who leads him to discover a refinery on land sacred to the Airbenders that may be causing the pollution he finds there.
