An adulterous couple turn to murder, only to discover that a petty crook and blackmailer has already had his eye upon them.

Charles Hilary is in love with Kathy Forrester, a beautiful television personality, but is married to Louise, an alcoholic with as many lovers as whisky bottles. His pleas for a divorce are met with threats and abuse. "You'll have to murder me first", Louise tells him and three hours later she is found dead, shot with her husband's pis...