On leave in a shore side town, Johnny becomes interested in a young dark haired woman. They meet and he learns that she plays a mermaid in the local carnival. After strange occurrences, Johnny begins to believe that she may actually be a real mermaid that habitually kills during the cycle of the full moon.

　　此条目为1985年出品，葛丽泰·嘉宝主演的版本请见