Detective Inspector Geraldine Steel relocates to London to take on another thrilling murder investigation. The bodies of two black girls are discovered in quick succession in North London. Concerned about a reaction from the local black community, the police are puzzled to learn that two teeth were extracted from both victims after they died. One of the girls worked in a massage parlour and suspicion falls on a client of hers, a known racist, but while the police flounder the killer takes another girl home to his attic, where he keeps his victims chained up while he shows them his 'collection'. With the death toll mounting, Geraldine is running out of time as she hunts for the elusive killer the papers are calling 'The Dentist'.
