独自前往澳大利亚旅行的李卫成（罗志祥饰），因为好友们的恶作剧，意外的与不顾家人反对而出国的杨小羽（杨丞琳饰）拼房同住；原本互看不顺眼的两人，却因此展开了一场充满谎言与意外的旅程。

一代著名特工凌凌漆（周星驰 饰）长期被上级弃用，沦为卖肉摊主。一具价值连城的恐龙骨架被一个浑身盔甲的金枪客盗去，因为线索少任务危险，凌凌漆又被高层领导委以重任。 凌凌漆依循线索来到香港，与联络人香琴（袁咏仪 饰）碰头，不想香琴处心积虑找机会要将凌凌漆杀死，原来她的另一身份是金枪客派来的杀手，但经历过出生入死的战斗后，香琴与凌凌漆渐生出了真情。而此时，金枪客的真实身份也被曝光，发现自己掉进某个阴谋里的凌凌漆开始奋力与敌手较量。

This is commonly known as Jean Renoir's first American film (1941), although Renoir scholar Alexander Sesonske has established that Renoir's creative role in the project was severely hampered by producer Darryl F. Zanuck and that he didn't regard much of the film as his own. (The ending, for instance, was written by Zanuck and directed by Irving Pichel.) Nevertheless, the film has certain beauties and pleasures. Part of it was shot in Georgia's Okefenokee swamp, and the treatment of the small community living ~Censored~ is often pungent and distinctive.

Margaret和Mark都被困在不断循环重复的一天，他们都以为只有自己被困住了，直到他们碰到彼此。他们试图制作一张地图，记录所有以前被他们所忽视的小确幸。期间，他们也不断地了解彼此，也找到了打破循环的方法。