This routine melodrama finds an Italian woman torn between her old lover and her husband. Karin (Bibi Andersson) is the resident of Rome who literally bumps into Bruno (James Farentino) after her piano lesson. The married man is immediately taken by her beauty and the two begin a passionate love affair. After a confrontation with Bruno's wife (Annie Girardot), Karin returns to Sweden and falls for the American diplomat David (Robert Stack). The two are married and return to the United States before David is assigned to Rome. Karin and Bruno meet again and resume their tawdry affair. When Karin tells Bruno she is going back to her husband, Bruno dies in an auto accident. Karin returns to her husband and young child with vivid and long-lasting memories of her adulterous affairs.