Forensic doctor Qing Ling travels to Sheung Shui village to look into and investigate the true events behind her brother's disappearance. The villagers are living in mortal fear of the curse of a creature known as the Water Monkey.

Shui Sheng witnessed his father being killed by the "water monkey" monster when he was young. Ten years later, the water monster reappeared and killed the younger brother and father of the heroine Xiang Lan. In order to save her, Shui Sheng launched a fierce battle to break feudal superstitions and to catch the water monster.