Based on an anonymous letter about Margot's fiancée's infidelity, the factory owner Hora hires detective Pejsek. His investigation then reveals Margot's efforts to obtain money from the factory owner for her lover Pepito, a fake gambler and swindler. Pepito has lost twenty thousand and must pay the money by midnight. At a fashion show, Margot receives a check from the factory owner for the purchase of a fur coat, but accidentally puts it in the pocket of a fur coat that the saleswoman and model Eva secretly borrows after the show...