Infernal Affairs

Yan (Tony Leung) is an undercover cop in the triads, recruited before he graduated from the police academy. A decade of hard work has planted him deep in the largest triad in Hong Kong. Ming (Andy Lau) is a mole in the police force, assigned by his triad boss to become a cop when he was barely eighteen. With the exclusive intelligence on his triad rivals, Ming has been promoted swiftly to head the Criminal Intelligence Bureau. Both men are feeling increasingly trapped in the inferno between good and evil: they are merely shadows with no identitiesBut on one fateful evening, all means point to an end: Ming is assigned to a police operation to bust none other than his own triad boss, while the police intelligence originates from their mole Yan, who happens to be the boss's most trusted henchman. As the operation unfolds, both sides realize there is a mole amongst themselves. To make things even worse, Ming is transferred to Internal Affairs and his first mission is to ferret out that mole in the police force...