The pilgrims eat some freshly picked mushrooms, and lose their memories. Monkey wanders off and joins a band of outlaws. They think he's the Fungus Prince who was banished by his father, King Seven Souls. The king wants to kill Tripitaka, so they plan to capture him and claim a reward. Tripitaka leaves Pigsy and Sandy and gets captured by Monkey and the outlaws. Yu-Lung sets out to help Monkey get his memory back so he can save Tripitaka.
