和妻子感情破裂后，报社撰稿人菲利克斯（杰克·莱蒙 Jack Lemmon 饰）被赶出了家门，无奈之下，他只得暂时搬到伙伴,好友,挚友,密友奥斯卡（沃尔特·马修 Walter Matthau 饰）的住处，和这个相识,明白,明了,知晓,理解,认知,懂得,结识,相知,熟识多年的好伙伴成为了室友。奥斯卡和菲利克斯的性格简直是冰火两重天，前者作风古怪个性孤僻常常将家里弄得一团糟，而后者却是个喜欢清洁和烹饪的好好先生。
　　虽然“同居”中的两人常常因为一些小事拌嘴，但他们的日常,生存,生计,日子都因为对方的存在而有了一丝的生机，隔壁住的一对来自英国的姐妹花更是给予了他们无尽的幻想。在奥斯卡的极力反对下，菲利克斯还是将两姐妹邀请到家中做客，没想到四人相待,交往,来往,共处的不错，当事态向着理想的方向发展时，奥斯卡却打死也不肯持续,延续,存续,连续了，抓狂的菲利克斯大发雷霆，这对好友之间的友情岌岌可危。

Back Stage is a 1919 comedy, one of the last films that Buster Keaton would appear with Roscoe "Fatty" Arbuckle before they went their separate ways, Keaton would get his own studio, and Arbuckle got into feature length films. In this film, Keaton, Arbuckle, and others, work as stagehands, backstage of course, in a playhouse trying to help and in some cases, stay far away from the eccentric and diva-like performers. When the performers rebel and refuse to do the show, the stagehands, along with Arbuckle's love interest, the assistant of one of the rebelling performers, perform in their place- including Keaton showing his ability to do butterflies, no handed cartwheels, while in drag.

Buster manages the store while Roscoe delivers the mail, taking time out for hide-and-seek with Molly. The constable, also interested in Molly, steals $300 while being observed by Buster.