DS Ramani de Costa is left to cope with the new Vulnerable Persons Unit which is low on staff while most of the other officers are dealing with a robbery so DCI Jack Meadows assigns DC Terry Perkins to assist Ramani on a case concerning a young man suspected of being a paedophile. Meanwhile it's Lance's stag do and after talking to Sheelagh, Lance decides he's doing the right thing in marrying Mark but in his stag do he goes out to make a phone call and is kidnapped by a group who put a bag over his head and pull him into the back of a van. Phil apologizes to Sam about the prison Liaison officer.

Inspector Gina Gold is taken prisoner at gun point by Irene Radford. The two women talk and realize they have more in common than both of them had realized but Irene orders the death of Jack Gaunt to show Gina she means business. Irene arranges for a plane to come and help her escape just as the police arrive. Gina tries to reason with Irene who says she will never go to prison and she looks like she's getting there when DC Rob Thatcher turns up and shoots Irene dead. Meanwhile Sam finds out about Phil and the prison Liaison officer and Honey has it out with Steve about having sex with Amber in a pub toilet!