Austin Wai plays Sum, a secret agent posing as the security chief of a remote mining colony where several employees have disappeared without a trace. At first Sum is impressed by the almost superhuman efficiency of the mine's workers, but soon becomes suspicious of the zombie-like manner in which the miners perform their duty. His worst fears are finally confirmed by the colony's resident physician (Deborah Sims), who has been forced to mix a powerful drug into the miners' meals that increases their strength while making them mental slaves of the company. Sum and the doctor prepare to expose the deadly secret, but with every other member of the colony out to get them, they may not live long enough to tell it.

Inspector James Wong, a family guy cop, goes deep into a case and gets involved with a deranged killer. His partner and friend, Inspector Steve Chan, long with a new protégé Porky take over the case and look for Inspector Wong who's "enjoying" the twisted company of the killer. Can Inspector Chan and Porky find Inspector Wong before he becomes the latest victim of the psychotic killer?

Bodyguard Ah Sun is sent to protect his boss' son, only to meet and fall in love with his gorgeous mistress.