身为一个单身汉，杰米（克里斯·奥唐纳 Chris O'Donnell 饰）感到十分自豪，对于婚姻所带来的束缚和牵制，他避之不及。一个人的不婚主义并不代表他不能追逐爱情，安娜（芮妮·齐薇格 Renée Zellweger 饰）的出现让杰米迅速坠入了爱河。一转眼3年过去，迫于各方面的强大压力，杰米终于决定走进婚姻的围城。没想到，自己不诚恳的求婚誓言惹恼了安娜，安娜选择了离去。 　　杰米的祖父去世了，留下了一亿美元的遗产，根据遗嘱，杰米必须再30岁之前结婚成家才能够得到继承的权利，而此时距离杰米30岁的生日只有24个小时了。如何在一天之内找到一个情投意合的新娘？又如何辨别这位新娘到底是爱杰米本人还是爱他的钱？杰米在安娜和诸多前女友之间迷失了方向。此时的他才意识到，结婚是一件非常神圣而严肃的事情。Jimmie is seeing his single friends get married one by one. He isn't too worried until his girlfriend Anne catches the bouquet at his friend Marco's wedding. Suddenly, his wild mustang days are numbered. He finally decides to propose to her, but he sticks his foot in his mouth and botches the proposal. Being insulted by the defeatist proposal, Anne leaves town on an assignment. After she's gone, he finds out that his recently-deceased grandfather's will stipulates that he gets nothing of a multi-million dollar fortune unless he's married by 6:05pm on his 30th birthday: tomorrow! Not being able to find Anne, Jimmie begins backtracking through his past girlfriends to find a wife.