A young village girl plays by the river and her father frightens her by pretending to be a fish demon, although he is then killed by a mysterious underwater creature. A Taoist priest kills a giant manta ray and insists the demon is dead. Buddhist demon hunter Sanzang appears to warn the animal is not the true demon but is violently ignored. The demon reemerges and kills a number of villagers but Sanzang is able to beach the fish-like demon, which turns into a man. Sanzang then opens a book of nursery rhymes and begins to sing to the man. The man feels harassed and attacks Sanzang but another demon hunter, Duan appears and captures him in her cloth, turning him into a puppet.