Though Ko Chit (Damian Lau) masterminds a series of high-profile robberies, he only steals from the rich to give to the poor. But when Detective Kong Yeung (Joe Ma) traces a large sum of illicit money back to the illusive thief, he triggers an intense cat-and-mouse game that brings their lives closer than ever to danger, deceit and betrayal. As two heads of the same coin, Chit and Yeung eventually develop mutual respect for one another, but where do they draw the line between good and bad?