"Reines d'Un Jour" is a film composed of four subplots. There's Hortense, a speech therapist who spends the major part of the film with her mobile because she wants to spend the evening with one of her two lovers. In parallel, a young photographer Marie who was present at a wedding and had sex with the groom learns she's pregnant . On the other side of Paris, a former chef on the telly Maurice is about to receive an one-time lover Jane but time passes by and keeps him waiting - Last but not least, Luis, a bus driver, learns on duty that his wife Michèle is leaving him.