Marianne (Claudia Coste) is deeply in love with her husband Michel (Michel Lemoine), a former cover-girl model trainer who leads a hedonistic life filled with unrestrained extramarital encounters. Despite her devotion, Marianne grows weary of Michel's endless sexual escapades. When she meets Philippe (François Cannone), a charming and attentive man, Marianne engages in an affair of her own, forcing her to decide whether to remain tied to her husband's unfaithful lifestyle or pursue a serious relationship elsewhere.