A murder investigation is launched when Pcs Ben Gayle and Tony Stamp discover the body of missing 19-year-old Abbey Ferguson. DS Stuart Turner and DC Stevie Moss learn that drug dealer and junkie Danny Peters, got Abbey hooked on heroin and forced her into prostitution so he could make money as her pimp.

After Danny insists that he didn’t see Abbey, fellow prostitute Nicole Johnson tells Stuart that she heard Abbey arguing with violent client Jimmy Gibbs, who she later saw dragging Abbey’s body out of the room. But when Pc Will Fletcher, Roger Valentine and Ben arrest Jimmy, he’s stunned to hear that Abbey has been killed.

It’s not long before Stuart and Stevie work out that Danny murdered Abbey when she refused to have sex with Jimmy, and gear up to make an arrest. But events take a horrifying turn when Danny lashes out and stabs Stuart in the neck with a syringe full of heroin…