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...

Unbeknown to Romano, his law school teacher is living with ex-convict Jack Lewis, the ring-leader behind a string of armed robberies. Already upset about the recent death of a close friend, Stacy is almost killed when she and Corrigan respond to armed robbery on a pawn shop, when the thug she apprehends disarms her. As Hooker and the team search for Lewis, who specialises in training criminals to disarm cops, the incident leaves Stacy with shaken confidence and an internal investigation over the lapse which nearly cost her her life...