Tom Killgannon, ex-undercover police officer and now in witness protection, is recalled to active service by his handler, DS Sheridan. His mission is to befriend notorious child killer Noel Cunningham and find out where he buried the bodies of his victims. The only problem is that Tom has to obtain that information from within Blackmoor prison itself. Undercover and with only DS Sheridan knowing he is there, Tom soon runs into danger. In the prison is convicted gangster Dean Foley. He used to run Manchester’s biggest gang, until Tom’s testimony put him away for life. He recognises Tom, and so begins a cat-and-mouse game as Tom fights for survival before Foley can get his revenge. But why can’t Tom reach DS Sheridan and what is the real reason that he has been sent to Blackmoor prison?