A young sailor is attracted to a mysterious mermaid performing at a carnival, but soon suspects that the girl is actually a siren who draws men to their watery deaths during the full moon.

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.—<[email protected]>