As told to a psychiatrist: Mr. Peabody, middle-aged Bostonian on vacation with his wife in the Caribbean, hears mysterious, wordless singing on an uninhabited rock in the bay. Fishing in the vicinity, he catches...a mermaid. He takes her home and, though she has no spoken language, falls in love with her. Of course, his wife won't believe that thing in the bathtub is anything but a large fish. Predictable complications follow in rather tame fashion.

　　亨利（加里·格兰特 Cary Grant 饰）是一名英俊帅气的法国军官，在前线，他结识了前来应援的美国陆军妇女队军官凯瑟琳（安·谢里登 Ann Sheridan 饰），尽管两人之间的交流经常伴随着吵吵闹闹，但随着时间的推移，亦产生了真挚而奇妙的感情。
　　战争结束后，亨利决定跟随凯瑟琳前往美国，结婚并开始幸福的生活，然而此时，一个难题却摆在了他们的面前，那就是亨利并不能取得美国的合法居留权。为了解决这个问题，亨利和凯瑟琳想了一个损招，那就是让亨利打扮成妇女队的军官，混进美国。让两人没有想到的是，这个看似完美的计划执行起来却遭到了诸多变故，他们能够获得最终的“胜利”吗？

　　As told to a psychiatrist: Mr. Peabody, middle-aged Bostonian on vacation with his wife in the Caribbean, hears mysterious, wordless singing on an uninhabited rock in the bay. Fishing in the vicinity, he catches...a mermaid. He takes her home and, though she has no spoken language, falls in love with her. Of course, his wife won't believe that thing in the bathtub is anything but a large fish. Predictable complications follow in rather tame fashion.

　　亨利（加里·格兰特 Cary Grant 饰）是一名英俊帅气的法国军官，在前线，他结识了前来应援的美国陆军妇女队军官凯瑟琳（安·谢里登 Ann Sheridan 饰），尽管两人之间的交流经常伴随着吵吵闹闹，但随着时间的推移，亦产生了真挚而奇妙的感情。
　　战争结束后，亨利决定跟随凯瑟琳前往美国，结婚并开始幸福的生活，然而此时，一个难题却摆在了他们的面前，那就是亨利并不能取得美国的合法居留权。为了解决这个问题，亨利和凯瑟琳想了一个损招，那就是让亨利打扮成妇女队的军官，混进美国。让两人没有想到的是，这个看似完美的计划执行起来却遭到了诸多变故，他们能够获得最终的“胜利”吗？