年过七十的高桥龙三（藤龙也 饰）曾是名噪一时的黑帮头目，而今他风光不再，委身寄居在儿子龙平（胜村政信 饰）的家中，还得忍受孩子们各种指摘与批评。许是对曾经热血岁月的回忆，让龙三相继和当年的哥们儿阿胜（近藤正臣 饰）、暴恐茂吉（中尾彬 饰）、快枪手马克（品川彻 饰）、拐杖市三（樋浦勉 饰）、五寸钉阿秀（伊藤幸纯 饰）和剃刀阿鹰（吉泽健 饰）等人碰头，老爷爷们把酒言欢，一拍大腿决定干脆再成立个黑帮组织——一龙会。与此同时，以西（安田显 饰）为首的新时代犯罪团伙京滨联合正展开不择手段的敛财行动，而一向看不惯他们的恶行的龙三一伙自然要与之发生冲突。老派的黑帮分子碰上新生代的犯罪团伙，却又是一场义理与金钱的较量……

香港最大黑社会帮会“和联胜”举行两年一度的办事人选举，阿乐（任达华饰）与大D（梁家辉饰）作为两大地区领导，暗地里展开争夺宝座的努力，一众有投票权的元老亦为自身利益而明争暗斗，选举因此相当不顺利。结果，阿乐再次获选成为办事人，满心不服的大D决定挑战帮规，他要抢夺到象征最高权力的信物龙头棍，组织新帮会。五名小头目（古天乐、张兆辉、张家辉、林雪、林家栋饰）牵连其中，为争夺龙头棍展开连番内斗。最终鹿死谁手，一切不得而知。

In 1672, two witches (Jennifer and her father Daniel) were burned by puritan Jonathan Wooley. In revenge, Jennifer cursed all future generations of the Wooley family, that the sons will always marry the wrong woman and be miserable. In the 20th century, a bolt of lightning frees Jennifer and her father from the tree that had kept their souls imprisoned. Jennifer assumes corporeal form and decides to make up-and-coming politician Wallace Wooley, then unhappily engaged, even more miserable by getting him to fall in love with her before his wedding. Wallace is a straight arrow, though, and Jennifer has to resort to a love potion. As we all know, love potions tend to backfire, with comedic results.

四年前，尼克（亚当·桑德勒 饰）与奥黛丽（詹妮弗·安妮斯顿 饰）生平第一次侦破离奇命案，如今他们全心投入私家侦探一行，生意却一直不见起色。当他们受邀参加印度王公好友（阿迪勒·阿赫塔尔 饰）在私人小岛举办的婚礼，麻烦却再度找上门：庆祝活动才开始，新郎就成为肉票，光鲜亮丽的宾客、亲友，甚至新娘本人，个个脱不了嫌疑。这件案子虽然危机四伏，尼克与奥黛丽却可能因此让侦探社起死回生，还能得偿夙愿，畅游花都。