富顿教授（加里·格兰特 Cary Grant 饰）是一位科学家，正在研究一种能够让人返老还童的神奇药物。某一天，富顿用来试验药物的黑猩猩从笼子里逃了出来，在实验室里“大闹天宫”，没想到竟然在误打误撞之下将富顿一直想要研制但始终没有成功的神药给捣鼓了出来。　　对此一无所知的富顿在偶然间喝下了这种药物，很快，药效便发挥了作用，富顿一反常态，言行举止俨然一幅二十岁小伙子的模样。秘书路易斯（玛丽莲·梦露 Marilyn Monroe 饰）前来拜访富顿教授，没想到却被他邀请去游泳、溜冰。之后，富顿的妻子爱德华（金格尔·罗杰斯 Ginger Rogers 饰）亦误食了药物，一连串让人忍俊不禁的趣事就此展开。

碧翠丝（金格尔·罗杰斯 Ginger Rogers 饰）是一名已经过气的百老汇女明星，一次偶然中她邂逅了名为克劳恩（威廉·霍尔登 William Holden 饰）的作家。年轻气盛的克劳恩当着碧翠丝的面对她提出了诸多的批评，没想到这反而吸引了碧翠丝的注意，让她对其产生了好感。　　碧翠丝的前夫哈里（保罗·道格拉斯 Paul Douglas 饰）是好莱坞知名的制片人，他于偶然之中读到了克劳恩所写的剧本，对其大加赞赏。碧翠丝和哈里找到了克劳恩，劝说他将故事里原本十九岁的女主角年龄改成二十九岁，以方便碧翠丝出演这个角色，最终克劳恩妥协了。莎莉（帕特·克劳蕾 Pat Crowley 饰）是初出茅庐的女演员，在读了克劳恩的剧本之后，她认为自己才是出演女主角的不二人选。

John Kent (Randolph Scott), a former star football player at Harvard, goes to Paris with his friend Huck Haines (Fred Astaire) and the latter's dance band, the Wabash Indianians. Alexander Voyda (Luis Alberni) has booked the band, but refuses to let them play when he finds the musicians are not the Indians he expected, but merely from Indiana (Huck Haines and his Indianians Band).　　John turns to the only person he knows in Paris for help, his Aunt Minnie (Helen Westley), who owns the fashionable Roberta gown shop. While there, he meets her chief assistant (and secretly the head designer), Stephanie (Irene Dunne). John is quickly smitten with her.　　Meanwhile, Huck unexpectedly stumbles upon someone he knows very well. Countess Scharwenka, a temperamental customer at Roberta's, turns out to be his hometown sweetheart Lizzie Gatz (Ginger Rogers). She gets Huck's band an engagement at the nightclub where she is a featured entertainer.　　Two things trouble John. One is Ladislaw (Victor Varconi), the handsome Russian deposed prince and doorman who seems too interested in Stephanie. The other is the memory of Sophie (Claire Dodd), the snobbish, conceited girlfriend he left behind after a quarrel over his lack of sophistication and polish.　　When Aunt Minnie dies unexpectedly without leaving a will, John inherits the shop. Knowing nothing about women's fashion and that his aunt intended for Stephanie to inherit the business, he persuades Stephanie to remain as his partner. Correspondents flock to hear what a football player has to say about feminine fashions. Huck gives the answers, making a lot of weird statements about the innovations John is planning to introduce.　　Sophie arrives in Paris, attracted by John's good fortune. She enters the shop, looking for a dress, but is dissatisfied with everything Stephanie shows her. Huck persuades her to choose a gown that John had ordered discarded as too vulgar. When John sees her in it, they quarrel for the final time.　　John reproaches Stephanie for selling Sophie the gown. Terribly hurt, Stephanie quits the shop. With Roberta's putting on a fashion show in a week, Huck takes over the design work, with predictably bad results. When Stephanie sees his awful creations, she is persuaded to return to save Roberta's reputation.　　The show is a triumph, helped by the entertaining of Huck, Countess Scharwenka, and the band. (A pre-stardom Lucille Ball, with platinum blond hair, appears uncredited in her first RKO film[4] as a model wearing an elaborate feather cape, after the vocal by Dunne, in the fashion show.[5]) The closing sensation is a gown modeled by Stephanie herself. At the show, John overhears that she and Ladislaw are leaving Paris and mistakenly assumes that they have married. Later, he congratulates her for becoming a princess. When she informs him that Ladislaw is merely her cousin and that the title has been hers since birth, the lovers are reunited. Huck and Lizzie, who decide to get married, do a final tap dance sequel.

皮特（查尔斯·科本 Charles Coburn 饰）是一名大学教授，一天，他奉父亲之命，来到夜总会寻找风流成性的表弟凯斯（詹姆斯·埃利森 James Ellison 饰），哪知道却意外邂逅了夜总会的歌女弗兰西（金格尔·罗杰斯 Ginger Rogers 饰），两人一见钟情，在一夜贪欢之后，两人结为了夫妻。　　激情退却后，皮特开始为自己的冲动之举担忧起来，父亲是一个思想非常顽固的男人，绝对不会接受弗兰西歌女的身份，不仅如此，父亲还早已经为他找到了门当户对的姑娘海伦（弗朗西丝·默瑟 Frances Mercer 饰）做他未来的妻子。皮特屡屡想要向父亲坦白自己和弗兰西的关系，却屡屡遭遇失败，还让父亲和弗兰西之间的关系越来越差。

演员保罗·奥尔曼偶然得知，他订做的燕尾服受到过诅咒，但凡是穿过它的人都会碰上厄运。在接下来连续发生的四个关于燕尾服和它的主人们的故事中，所谓的“厄运”似乎往往将事物真实的一面向人们揭示开。

千金小姐特里·兰多（凯瑟琳·赫本 Katharine Hepburn 饰）家境殷实地位高贵，然而性格倔强的兰多却不想依靠家族的关系登上百老汇的舞台。怀揣梦想满怀抱负的兰多住进了一个带有戏剧色彩的俱乐部。兰多从而结识了她的室友珍·梅特兰（金格尔·罗杰斯 Ginger Rogers 饰），一个夸夸其谈的女演员。面对残酷的竞争，兰多渐渐发现自己跟其他人的不同，她演戏只是出于热爱，而其他人却是为了生存。兰多的父亲决定暗中帮助女儿的事业，却不曾想过他的暗中帮忙反而对女儿造成了更大的伤害。　　影片荣获1938年第10届奥斯卡金像奖最佳影片、最佳女配角、最佳导演和最佳剧本4项提名。

约翰（弗雷德·阿斯泰尔 Fred Astaire 饰）是一名极富才华的舞蹈家，歌手卡德（维克托·摩尔 Victor Moore 饰）是约翰最好的朋友兼搭档，两人之间的友谊十分深厚。约翰一心想要迎娶自己的青梅竹马玛格丽特（Betty Furness 饰），但卡德却并不看好这桩婚事。为了搅黄约翰的婚礼，卡德找到了各种借口拖延时间，导致约翰最终错过了结婚典礼。愤怒玛格丽特和父亲要求约翰拿来两万五千美元，方可得到他们的原谅，无奈之下约翰只得踏上了筹钱的旅途。　　约翰和卡德来到了纽约，在一场意外中邂逅了名为佩妮（金格尔·罗杰斯 Ginger Rogers 饰）的女子。一番波折之后，约翰发现佩妮是一名舞蹈教练，不仅如此，两人的节奏亦十分合拍，于是决定组成搭档。