Lucienne, saleswoman (uncredited)
Charles Lepicard, Lucas Malvoisin y Éric Masson pretenden falsificar billetes. Éric cree tener bajo manga a un grabador sin igual, el de un tal Mandarès (ahora preso), Robert Mideau, le "Cave", es decir, en el argot de los truhanes, un ser ordinario, crédulo e ignorante. Pero el fraude no se puede hacer sin Ferdinand Maréchal alias "Le Dabe", antiguo falsificador de élite. Retirado en Venezuela tras un golpe frustrado, recibe la visita de Charles que le propone un último negocio con los florines, la misma moneda del golpe frustrado. Le Dabe acepta y viaja a París. El equipo se pone a trabajar.
American fashion model Anne Traymore, swimming off the isle of Majorca, loses a bracelet, which the handsome Manuel del Rio Montoya returns to her. She believes he owns a beautiful yacht called The Swan, but he merely works on it for the wealthy Rene LeClerc.
A young woman has been run over by the car of Carlos, a brilliant embassy attaché. Feeling sorry for her, Carlos drives her to his place and decides to take her in. The young lady accepts his offer but refuses to tell Carlos her name, wanting to be called Miss Pigalle, after the Paris district where she was born. It does not take long before Yvonne (Miss Pigalle's true name) and Carlos fall in love. Life is like a dream and, when Yvonne gets pregnant, their happiness is at their peak. Unfortunately, a revolution breaks out and Carlos returns to his country in secret. Feeling forsaken and at a loss, Yvonne, who is now penniless, has no other solution but prostitute herself.
En el curso de una investigación un inspector de policía se queda prendado de una joven drogadicta, relacionada con la víctima del caso que él investiga. Se plantea entonces renunciar a sus pesquisas, pero entonces descubre al responsable del crimen.
(uncredited)
Jo Guardini, now the peaceful owner of a charming inn by the banks of the River Marne, once was a dreaded gangster. The respectful citizen does not want to have anything to do with the underworld any more. Unfortunately, two of his former accomplices kidnap a little girl and decide to hide her in his hotel. What will Jo do : side with the law in the person of inspector Loriot or have a relapse in crime?
Lyane is a singer and daughter of the producer of the operetta: "C'est une fille de Paris". She convinces the composer of the music, Jacques Kellermann, whom she loves, to sign her piece. The famous composer Jean Paget, who cannot put the work to his advantage, declares to Jacques that Lyane had a child by him. Shocked, Jacques breaks with the singer who soon knows the celebrity. Finally, he realizes that happiness is ready to be seized, because the beauty still loves him...
