爱玛(乌玛·瑟曼 Uma Thurman 饰)是一名电台情感节目的主持人,在工作上一帆风顺的她在爱情上也是硕果累累,很快她就要和相恋多年的男友理查德(柯林·菲尔斯 Colin Firth 饰)一同踏入婚姻的殿堂了。没想到,在登记的当天,这对情侣竟然被告知其中的女方已经有了一个法律意义上的丈夫,而对于这个神秘的男人,爱玛一无所知。 原来,在曾经的节目中,爱玛曾经劝说一位女性和其男友分手,而这个倒霉的男友就是爱玛如今的神秘丈夫——派崔克(杰弗里·迪恩·摩根 Jeffrey Dean Morgan 饰)。恼羞成怒的派崔克决定好好的报复一下这个口出狂言的女主播,于是有了现在的尴尬局面。为了劝说派崔克和自己解除婚约,爱玛费劲了心思,但在和派崔克相处的过程中,爱玛发现自己无法避免的被派崔克所吸引。在男友和“丈夫”之间,爱玛不知该如何选择。Emma Lloyd has made a career out of her sensible, mature and responsible approach to relationships. She has a hit radio talk show, an impending book deal, and a loving relationship with her fiancé, Richard, a conventional sort-which is precisely what Emma is drawn to. Then Emma finds out that she is already married to a man she's never met before, a result of a misguided prank that leaves her bewildered and very confused. Worse than that, her plans for the future are now threatened. With her wedding just around the corner, Emma must find the mystery man and obtain an annulment. Emma tracks down her "accidental husband" - Patrick, a charming and handsome neighborhood fireman, with a big secret...that he was behind the "accidental" marriage. Unable to fess up, Patrick goes along with the ruse pretending to be just as baffled as Emma. While at first their opposite approaches to life create much tension and chaos, Emma soon starts to admire his carefree passion for life and doubt her own conservative, button-down views on life and love. As Emma's wedding draws near, she is faced with the choice between her safe life with Richard or the chance to live in the passionate and spontaneous world that Patrick inhabits.