Richard Carlson stars as a jazz pianist who allows his clingy girlfriend to plunge to her death from a lighthouse, freeing him to marry girlfriend number two, who doesn't suspect a thing. Cue the guilt trip, eerie theremin music, and ghostly visits as the dead woman begins to haunt him with a vengeance.

A man lets a former flame fall to her death rather than let her interfere with his new relationship, but her ghost returns to disrupt his impending nuptials.