盖瑞（文斯•沃恩 饰）在球场上遇见了布鲁克（詹妮弗•安妮斯顿 饰）并对她一见钟情。两人很快同居了。不久两人就在各种生活的琐碎事情中矛盾重重，艺术家气质的布鲁克看不惯盖瑞的不拘小节，矛盾再一次升级，布鲁克提出分手。 　　由于房子是共同的财产，他们都没有搬离房子。布鲁克不断约会帅气的男孩，盖瑞也把屋子弄得乌烟瘴气，更带脱衣女郎回家，但彼此心中还是爱着对方。在朋友的劝解下，他们出售了房子，并要在两个星期之内搬走。 　　凡事粗心的盖瑞终于在与朋友的聊天中得知了布鲁克的真实想法，当他想布鲁克剖白心意的时候，却遭到了布鲁克的拒绝……In Chicago, the art dealer Brooke Meyers feels not appreciated and neglected by her immature boyfriend Gary Grobowski, who is partner with his two brothers in a tourism business, and decides to break-up with him to make Gary miss her. Gary misunderstands her true intention, both follow the wrong advice of family members and friends, beginning a war of sexes with no winner.