A group of vigilantes, inspired by a masked killer in Miami, fights organized crime in Hong Kong. They wear animal masks and use the lawless Kowloon Walled City as a base of operations. When they learn of a meeting between triads and a corrupt cop at a local tea house, they move in to wipe out the criminal scum. What secret is the cop offering to sell to the gangsters? If the vigilantes manage to find out, will they even want to know?