王薄（刘德华 饰）和王丽（刘若英 饰）本是一对最佳贼拍档，但因怀了王薄的孩子，王丽决定收手赎罪，两人产生分歧。在火车站遇到刚刚从城市里挣了一笔钱准备回老家用它盖房子娶媳妇的农村娃子傻根（王宝强 饰）后，王丽被他的单纯打动，决定暗中保护不使他的辛苦钱失窃，王薄却寻思找合适机会下手，但 最终因为“夫妻情深”归入了王丽的阵营。 不料傻根的钱早被以黎叔（葛优 饰）为头目的另一著名扒窃团伙盯上，于是一系列围绕傻根书包里的钞票、在王薄、王丽和黎叔团伙之间展开的强强斗争上演。Two grifters, Wang Bo and Wang Li, a couple who've been arguing, board a train in rural China. He wants to fleece a peasant, nicknamed Dumbo for his naiveté, who's carrying 60,000 yuan and trusts everyone. She wants to protect the hick kid, an act of expiation brought on by prayer and a visit to a temple. Also on board are one of more sets of thieves, including a calculating boss and his femme fatale. The boss wants to recruit Wang Bo, and a series of contests ensue, with the potential of turning deadly. While Li guards Dumbo from Bo and the others, can she and Bo sort out their relationship? And can Dumbo's simple spirituality touch anyone else?
