Young, handsome, dashing but cynical, Octave Mouret arrives in Paris, determined to conquer the belles of the capital. His first attempts are not too successful though as he is rebuffed by Valérie Vabre, the neurotic wife of the landlord of the block of flats he is accommodated in. As for the affair he starts with Caroline Hédouin, the married owner of "Au Bonheur des Dames", t...
尽管父亲是著名的婚外情调查专家，尽管见识过了无数的忠贞感情最终化为泡影，艾莲（奥黛丽·赫本 Audrey Hepburn 饰）却依旧对爱情有着无限的期望和憧憬，她甚至觉得，只有那些明知不道德却还要迎难而上的恋情才能算的上是真爱。一次偶然中，艾莲结识了父亲的调查对象法兰肯（加里·库柏 Gary Cooper 饰）——一个在情场上如鱼得水的风流浪子。
艾莲捏造了虚假的身份，开始在法兰肯面前扮演起了神秘女郎的角色，没想到，自己的纯情和真挚竟然猎得了这位浪子的真心。法兰肯拜托私家侦探调查艾莲的踪迹，没想到这位侦探正是艾莲的父亲。迫于父亲的压力，本来心心相印的两人只得分手，一对天设地造的情侣眼看这就要擦身而过。
