The Vice Squad investigates the murder of a pimp. Sgt Robinson comes under suspicion for the murder. DI Chappel begins a relationship with the victim's mother.

DI Chappel has to sacrifice his new relationship to save Sgt Robinson from the murder accusation.

The Vice Squad investigate a series of murders of street prostitutes. Chappel gets involved with a young prostitute and is convinced that an arrogant city slicker who has befriended her is behind the murders.