非亲兄弟

39岁的布伦南•哈夫（威尔•法瑞尔 Will Ferrell 饰）无业，一直在母亲南希（玛丽•斯汀伯根 Mary Steenburgen 饰）家蹭吃蹭住。40岁的戴尔•多巴克（约翰•赖利 John Reilly 饰）也是个与父亲罗伯特（理查德•詹金斯 Richard Jenkins 饰）住在一起的大龄男，靠父亲的接济生活。南希与罗伯特一见钟情，婚后搬入罗伯特家居住，布伦南也随母亲一起搬入，从此被迫以继兄弟的身份与戴尔同处一室。二人从相互敌视逐渐成为最佳拍档，共同对付布伦南的优秀弟弟德里克（亚当•斯科特 Adam Scott 饰），玩闹得不亦乐乎。可没想到他们的胡作非为却毁了父母刚建立起来的美满婚姻，二人后悔万分，终于决定痛改前非……Brennan Huff and Dale Doback are both about 40 when Brennan's mom and Dale's dad marry. The sons still live with the parents so they must now share a room. Initial antipathy threatens the household's peace and the parents' relationship. Dad lays down the law: both slackers have a week to find a job. Out of the job search and their love of music comes a pact that leads to friendship but more domestic disarray compounded by the boys' sleepwalking. Hovering nearby are Brennan's successful brother and his lonely wife: the brother wants to help sell his step-father's house, the wife wants Dale's attention, and the newlyweds want to retire and sail the seven seas. Can harmony come from the discord?