DI Chappel has been transferred to a desk job and DS Vickers has been drafted into the Vice Squad.

Inspector Joe Robinson returns to the Vice Squad, and attempts to nail a violent pimp.

The Vice Squad investigates an amusement arcade manager suspected of recruiting young runaways as rent boys.

The manageress of a pole-dancing club suspects her uncle of using it to run a prostitution racket.

The Vice Squad assists the Serious Crime Squad to investigate the murder of a prostitute, with PC Morgan acting as liaison to the senior investigating officer.

DI Robinson investigates a club owner suspected of encouraging drug dealing on the premises, only to find that the club is a base for human trafficking.

PC Johnstone's relationship with a known pimp is discovered. DS Vickers attempts to use her for his own ends.