Paul Freneuse, a young, successful, Parisian artist, returning to his studio in the Place Pigalle by the Les Halles omnibus at midnight, is seated in the omnibus when a young, beautiful girl suddenly dies. He at first thinks the poorly clad girl has been murdered, but logic tells him no one would have a reason to kill such an unlikely victim. He dismisses the idea and continues his work on an almost completed canvas which he hopes to submit to the up-coming Paris Exposition. He is highly regarded by the critics and is expected to win, cementing his already considerable reputation. Fortunately for justice, his ne'er-do-well friend, Binos, will not abandon the search for the supposed murderers and solicits the aid of the mysterious Piédouche to bring the killers to justice.