山姆（凯文·克莱恩 Kevin Kline 饰）和妻子结婚多年，两人感情十分要好，然而，腿脚的不便削减了山姆本该享受的快乐，再加上一个负能量爆棚的邻居，山姆觉得人生似乎失去了乐趣。阿尔奇（摩根·弗里曼 Morgan Freeman 饰）和儿子相依为命，可是，性格过于严厉的儿子令阿尔奇感到透不过气。派迪（罗伯特·德尼罗 Robert De Niro 饰）刚刚失去了挚爱的妻子，这让他的生活瞬间陷入了一片空洞和苍白之中。比利（迈克尔·道格拉斯 Michael Douglas 饰）正在着手准备他和年轻妻子的婚礼，这几乎成为了他生活的全部。 四个人至暮年的老人，四位患难与共的好友，当他们重新聚集到一起，决定最后疯狂一把去拉斯维加斯参加单身派对之时，会有怎样有趣的故事发生呢？收起
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