Grey conducts a triple murder investigation, the last murder committed gives him some clues to the murderer and that the victim may have known his killer. He devises a plan to identify the guilty party, who is a scary psycho and he is captured.

Cast

Pierre Stéphen

Maurice Lagrenée

Jeanne Helbling

Charlotte Lysès

Roger Legris

Georges Paulais

Charles Lemontier

Georges Marceau