Who's the Crook(Mao pai da zei)

Ah Wah is an easygoing young man has three good friends. He works in an office, and his manager is the suspicious Shum, who one day asks Wah to carry eight million dollars cash for a business transaction. Wah gives in to temptation and hatches a plot to divert the cash. But his boss Shum is playing a much more tricky game.