A Japanese tourist, Tokio, meets a 15-year-old Hong Kong girl and her grandmother left behind in Hong Kong while their family emigrates to Canada.

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?