Action heist movie, set on a train, in which two sets of thieves do battle over the life savings of a passenger. Fresh from their latest scam, con artist couple Wang Bo (Andy Lau) and Wang Li (Rene Liu) catch a train to make good their escape. Befriending naive village boy Sha Gen (Baoqiang Wang), Wang Bo decides to steal the life savings he's carrying, much to the disgust of his pregnant partner who decides to protect the boy instead. But when a group of thieves led by Hu Li (Ge You) boards the train, a contest quickly develops between the two rival camps for Sha Gen's cash, all the while watched over by local undercover police biding their time.