Hooker and Romano by chance spot a van swerving dangerously over the road – in which a pair of teenage prostitutes are being held against their will by two men. When the van crashes off the road, they find one of the girls dead after being strangled – the latest victim in a series of killings by ""The Boulevard Strangler"" and his accomplice, who are prying on young runaways. Hooker finds that the surviving girl has run away after being abused at home, and leads a double life – a perfect high-school student, and as a prostitute. But now the girl is in danger with the killers after her, who are concerned that she can identify them in the murder of the other girl... Meanwhile, Corrigan considers leaving the force to take a job teaching...

Investigating the killing of a fashion model, who had also been working as a high-class prostitute, Stacy's contact, another model, is too found murdered in similar circumstances. Stacy befriends the murdered girl's room-mate, and goes undercover as a model at the company that the girls belonged to, to try and root out the killer, who is using sale of the girls to ensure a large order of costumes. But Stacy's handling of the case causes some friction between Corrigan and herself...