"Le Tambourin", a Montmartre nightclub, is on its way down. Although it can boast great performances by the alluring Les Bluebell Girls and by Jacques Hélian's lively Big Band the venue does not attract people anymore. Nightclub patrons now prefer the jazz cellars of Saint-Germain-des-Prés. Taking this new taste into account, the staff of the "Tambourin" and Jacques Hélian decide to set up their own club, "La Pivoine Ecarlate". They are joined by Pâquerette, a flower vendor and amateur singer, and by Jean-Pierre Francis, an existentialist poet...

A young sculptor presides over the destinies of a student club where a miserable young girl ends up one evening. The treasurer of the association falls in love with the young girl who returns the favor. The war. The sculptor comes back blind. Out of gratitude, the young girl marries him and restores his confidence in his talent; out of discretion, the treasurer steps aside.