两个朋友踏上穿越沙漠的致幻蘑菇之旅，面对他们的恐惧、怀疑和失败。
四个逃跑的骗子躲在一对盲人夫妇住的平房里。
富商巢老爷临终立下遗嘱，将所有遗产都传给远在法国的女儿飞飞（吴君如 饰），遗嘱由巢二爷保管。巢老爷的不肖子秋千方百计想修改遗嘱，而二爷的不肖子大傻亦想取得遗嘱私自修改。一晚，幸运星（周星驰 饰）到巢家偷窃时被大傻抓住，见他偷窃有一手，大傻命令幸运星帮助自己偷遗嘱。而阿秋 亦无意中发现在垃圾场专门捡垃圾的垃圾凤（吴君如 饰）样貌竟然和他妹妹飞飞一模一样，于是命令阿凤假扮其妹骗取二爷掌管的遗产。 就在二爷去迎接从法国回来的假飞飞（阿凤）的晚上，幸运星按大傻吩咐潜到了巢家大宅去偷遗嘱。不料事情败露，被二爷抓个正着。情急之下，幸运星谎称自己是飞飞多年前的男友，企图蒙混过关。而不知就里的阿凤怕露出马脚，也承认了幸运星是她的男友。于是一场笑料百出的遗产争夺战开始了。
安妮（琳赛·洛翰 Lindsay Lohan 饰）和荷莉（琳赛·露安 Lindsay Lohan 饰）两个小女孩在夏令营中相识。她们相貌惊人地相似，却非常合不来。十分偶然的，她们知道了对方原来是自己的孪生姐妹。她们开始互相打听对方的生活，讨论自己的父母：他们在一个豪华的航海轮船上相遇，在旅途中就结了婚，然而最后却以感情破裂收场。因为这场离异，双胞胎姐妹一个被爸爸（丹尼斯·奎德 Dennis Quaid 饰）带到加州，生活在一个美丽的葡萄园；一个则被当婚纱设计师的妈妈（娜塔莎·理查德森 Natasha Richardson 饰）带到伦敦。两人因此从未谋面，甚至不知道彼此的存在。得知了这个真相，两个调皮的小鬼开始谋划她们的计策：她们决定调换身份，到对方的家庭去生活。一切都进展顺利，直到父亲要再婚，姐妹俩对后母（伊莲·亨德里克斯 Elaine Hendrix 饰）的一场疯狂狙击大战开始了……本片翻拍自1961年版美国电影《爸爸爱妈妈》。年仅11岁的琳赛·洛翰凭借在片中一人分饰两角的表演，荣获1999年美国“艺术新秀奖”最佳年轻女演员奖。
At Christine's funeral, her foster son suddenly shows up, a grown-up man with whom the family has been out of contact for quite some time. He brought a letter, stating that Christine wants to be buried in Wentelen, to the bewilderment of her biological children, and even more so to that of her husband. In addition to that, all the relatives are surprised that the foster son of Christine apparently maintained a correspondence with Christine. Nevertheless, Christine's last wish is respected, and they decided to bury her in Wentelen, and wish to do so traditionally, meaning: walking behind the hearse. During a walk of several days, all the relatives (foster sisters, foster father, alleged friends and real ones, the foster son, lovers) have enough time to get to know each other better. Because in the end they have no other conclusion than that nobody really knew anyone. Old intrigues are dug up, the foster sisters finally learn why the foster brother just disappeared from the family, and they can begin to develop a real image of the mother. Once Christine's final resting place is reached and she is buried, all family ties, good and bad, are shaken around.
