The triumvirate of man’s men Sean Lau Ching Wan, Louis Koo and Daniel Wu star as high-tech criminal intelligence officers investigating a devious executive suspected of monumental insider trading. When two of the cops get wind of an extremely lucrative secret, they go turncoat and try to cash in. Their altruistic boss intervenes but it proves too late, corruption spins the once-straight path to justice into violent chaos, with devastating repercussions for all. Mak and Chong, the power duo behind the Infernal Affairs trilogy and other hits, wrote and directed this uber-intense, multifaceted morality tale that examines the thin lines between good, evil, righteousness, greed, and the will to survive. An expansive edge-of-your-seat thriller layered with provocative human drama, this indictment of surveillance culture and avarice marked a major turning point in Hong Kong Cinema this millennium.