Anna lives a secluded life with her husband Count Alessio Capilupi, who is almost twice her age, and her son Sergio, whom she adores. Antonio, a young man from one of the wealthiest families in Italy and a successful powerboat racer, falls passionately in love with her; but at first she keeps her distance. It is only when her husband Alessio reproaches her after having heard rumours that his wife may be having an affair that she decides not to postpone her happiness any longer, and begins a passionate affair with Antonio.