你对全家出游的容忍度有多高？ 亚历山大家族踏上堪称史诗级灾难的“溯源之旅”，一切只因为某人身上受到了诅咒……
When a faithful police dog and his human police officer owner are injured together on the job, a harebrained but life-saving surgery fuses the two of them together and Dog Man is born. Dog Man is sworn to protect and serve—and fetch, sit and roll over. As Dog Man embraces his new identity and strives to impress his Chief (Lil Rel Howery, Get Out, Free Guy), he must stop the pretty evil plots of feline supervillain Petey the Cat (Pete Davidson; Saturday Night Live, The King of Staten Island). Petey’s latest plan is to clone himself, creating the kitten Lil Petey, to double his ability to do crime stuff. Things get complicated, though, when Lil Petey forges an unexpected bond with Dog Man. When Lil Petey falls into the clutches of a common enemy, Dog Man and Petey reluctantly join forces in an action-packed race against time to rescue the young kitten. In the process, they discover the power of family (and kittens!) to bring even the most hostile foes together.
清朝末年的香港，在上、中、西环有“镇三环”之称的帮办暗中勾结西环恶霸勾心虎，西环治安一时乌烟瘴气。警官马如龙（成龙）奉命接管西环后，迅速将勾心虎拘捕人狱，招来“镇三环”的怨恨。 彼时内地革命风云翻涌，革命党人来港宣传，并计划营救被捕同志。为将革命党人一网打尽，清廷派遣密使联络镇三环，马如龙结识白影红、莹莹、珊珊等革命党人（张曼玉、关之琳、刘嘉玲等）后也被卷入斗争漩涡，而同时，一群四肢发达头脑简单的海盗正在伺机向马如龙报仇。
故事讲述鲍伯刚和恋情长跑的女友分手，心碎不已时巧遇一只可爱到不行的流浪猫，而鲍伯好友克拉伦斯更被小猫萌翻，两人给小猫取名‘Keanu’，而‘百炼钢化为绕指柔’大男人从此化身猫奴，每天陪猫、爱猫，与猫为伍。某天鲍伯的家被流氓集团闯空门，更惨的是他们的爱猫‘Keanu’竟然被绑架！为了营救爱猫，两人决定混入贩卖毒品的圈子，为方便接近流氓集团......
两父子谢峻（卢惠光饰）、谢飞（谢苗饰）号称是世界上武功最高的父子，果不其然，他们勇闯虎穴打败独角猩猩兽，救出了被关在山中的小公主。其实只是他们的一场英雄美梦。一日，谢父正在教授村民功夫时，突然接到师公的求救信号。为了满足师公的心愿，谢飞和父亲谢峻只好偷渡来到香港。当两人前去解救时，发现师公已被关进精神病院。不仅如此，父子二人还莫名其妙地被卷入一起抢劫珠宝杀人案中。在警察的追捕中，父子失散。 在香港这个复杂的花花世界里，失散后的父子俩发生了一段段有趣的故事。
