No submundo da Belle Époque parisiense, a sensual e atrevida Marie abandona seu namorado gângster ao se apaixonar por Manda, um ex-criminoso e carpinteiro honesto. Mas essa paixão dará origem a uma rivalidade no submundo que levará inexoravelmente à traição e tragédia.
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Two friends, Tricoche and Cacolet, are partners in a detective agency. Chance has it that Cacolet is hired by Van der Pouf, a rich banker who wants him to watch over his wife Bernardine while the latter, on her part, seeks the services of Thicoche.
