Upon receiving a death threat from the "Gorilla", a killer infamous for a string of murders, insurance broker Walter Stevens employs detectives Garrity, Harrigan and Mulligan for protection. The detectives arrive at Stevens' mansion that night, and proceed to explore the house and grounds, and question servants. All to no avail, because as the clock strikes midnight Stevens disappears.

Upon receiving a death threat from the "Gorilla", a killer infamous for a string of murders, insurance broker Walter Stevens employs detectives Garrity, Harrigan and Mulligan for protection. The detectives arrive at Stevens' mansion that night, and proceed to explore the house and grounds, and question servants. All to no avail, because as the clock strikes midnight Stevens disappears.

A young woman visits her childhood home, shuttered some 13 years after the fateful night her father died at the dinner table while they waited for a 13th guest. While reminiscing, she hears a noise. Frightened, she begins to explore. She screams. A shot is fired. On arrival, the police find the stiffened body of a young woman sitting at the dinner table. Stars: Ginger Rogers, Lyle Talbot, and J.