A man (Young) comes round after a car accident, and realises that a perfect crime is now possible any movie with this scene can't fail. From this halfway point, the anxious mood of this rare noir thriller thickens fast. …

As told to a psychiatrist Mr. Peabody, middle-aged Bostonian on vacation with his wife in the Caribbean, hears mysterious, wordless singing on an uninhabited rock in the bay. Fishing in the vicinity, he catches...a merma…