Industrialist François Delambre is called late at night by his sister-in-law, Helene, who tells him that she has just killed her husband. Reluctant at first, she eventually explains to the police that he invented a matter transportation apparatus and, while experimenting on himself, a fly entered the chamber.

• 20th Century Fox
• Regal Films
• David Hedison
• Patricia Owens
• Vincent Price
• Herbert Marshall
• Kathleen Freeman
• Betty Lou Gerson
• Charles Herbert
• Eugene Borden