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.

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Main Cast: Pierre Stéphen, Doumel, Maurice Lagrenée, Jeanne Helbling, Charlotte Lysès, Roger Legris, Jacqueline Saint-Pierre, Yvette Thamar, Freddy Hubert, Georges Paulais

Directors: Alfred Gragnon, Pierre Maudru

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