Thérèse Ravenaz is a charming young woman but also the victim of a seducer who abandoned her as soon as he was told she was expecting a baby. To trace her unworthy lover, she boards a taxi driven by Emile Gauthier, a friendly cabdriver, who accepts to help her. But street after street, district after district, the seducer is nowhere to be found in Paris. And when she finally ac...