Four women were murdered, each was knifed and, though they had their clothes torn, they weren't molested. As the famed police inspector Jules Maigret pieces the clues together, he comes to realize that for the elusive man that he suspects to be unmasked, he has to set him a trap.

• Jolly Film
• Intermondia Films
• Jean Gabin
• Annie Girardot
• Olivier Hussenot
• Jeanne Boitel
• Lucienne Bogaert
• Jean Debucourt
• Paulette Dubost
• Lino Ventura