Philippe de Blassac, the lover of the Marquise de Beauséjour, an influential woman who reigns over the Bordeaux society, leaves his mistress to marry Sarah, a young Jewish girl. But the Marquise, bitter and jealous, will not hear of it. What she wants is to take revenge and nothing else. Fortunately, Raoul de Blassac, Philippe's cousin arrives in time to foil the scheming plans against Sarah and her husband.