Andrew Lau

Months after the events of the original film, Ming suspects a police superintendent as being a new mole for the triads, while years earlier, Yan embarks on his first mission.

In this prequel to Mou gaan dou (2002), Chan Wing Yan has just become an undercover cop in the triads while Lau Kin Ming joins the police force. Both the triads and the police find an enemy in a rival crime boss.

A hyper-vigilant employee of the department of public safety, while training his young female replacement, has to track down a missing girl whom he is convinced is connected to a paroled sex offender he is investigating.

Two best friends rise through the ranks of New York's Chinese underworld in the 1980s.

A story between a mole in the police department and an undercover cop. Their objectives are the same: to find out who is the mole, and who is the cop.