玛丽(珍妮弗·琼斯 Jennifer Jones 饰)在意大利度假时邂逅了名为乔班尼(蒙哥马利·克利夫特 Montgomery Clift 饰)的男子,两人之间相互吸引,很快就走到了一起,相互陪伴度过了快乐的两天。然而,快乐的日子都是短暂的,玛丽即将离开意大利前往巴黎,乔班尼劝说玛丽留下来,留在他的身边,可是固执的玛丽却去意已决,这让乔班尼非常的愤怒,他失手打了玛丽。 悲伤的玛丽准备搭上前往巴黎的火车,就在火车快要开动的时候,乔班尼出现了,他不顾危险穿越轨道来到玛丽的身边,他的举动感动了玛丽,两人重修旧好。虽然错过了这一班火车,但下一班火车很快就来了,留给两人的时间越来越短了。A married American woman has gotten involved with another man while visiting relatives in Rome. She decides that the time has come to break off the relationship, and she makes plans to return home to her husband. But she soon realizes that she is not at all sure about what she wants to do, and she continues to agonize over her decision.