When William Gridley arrives from the US in London, he rents part of Carly Hardwicke's house from her and promptly begins to fall in love. Gridley doesn't know that many people think she killed her husband but his boss, the American ambassador, knows and doesn't take this "lapse of judgement" lightly. Since Carly is also American, Gridley saves his job by introducing her to the ambassador, who is promptly smitten and promises to help her. So when a Scotland Yard detective arrives, wanting to get to the truth one way or another, they say they'll help him. And then the comedic complications really begin.
一个精明的乐器商扮作音乐教授Prof. Harold Hill,来到衣阿华州的小镇River City;他以他的高超技巧和超级感染力,成功的说服居民小镇需要成立一个男孩乐团,他开始让整个小镇疯狂,除了2个人--小镇镇长,钢琴女教师暨图书管理员。事实上,Harold根本不是什么教授,他甚至连一个音符都不懂...穿帮在即,Harold如何应付呢?
故事发生在奥地利维也纳,丘托克(阿道夫·门吉欧 Adolphe Menjou 饰)虽然迎娶了年轻美貌的妻子米琪(玛丽·普雷沃斯特 Marie Prevost 饰),但他的婚姻生活却并不幸福,因为米琪是一个水性杨花的女人,结婚没多久就移情别恋了。米琪喜欢的是自己的好友夏洛特(Florence Vidor 饰)的丈夫弗兰茨(蒙蒂·布卢 Monte Blue 饰),对他百般引诱,而丘托克决定将此作为提出离婚的绝佳契机,于是雇佣了私家侦探(哈利·迈耶斯 Harry Myers 饰)想要得到米琪出轨的证据。
夏洛特当然明白米琪的狼子野心,于是对她处处提防,而因为米琪的介入,她和弗兰茨之间的感情也渐渐出现了裂痕。终于,在一次激烈的争吵后,弗兰茨选择了离家出走。