Chappel goes undercover as an insurance-broking lodger to investigate a suspected porn merchant, who makes a sideline in dirty movies whilst running his own above-board video rental shop. However, when he learns that the residence is in fact the base for a paedophile ring, the case is recategorised and taken from Vice, leaving Chappel furious upon discovering that the case has been handed to Robinson – his first assignment since his promotion to Inspector. Meanwhile, as Hutchins begins questioning her loyalty to Chappel, the latter—unable to continue allowing the repeated abuse of a 12-year-old girl—attacks the prime suspect, eliminating any chance of bringing down the ring.