While investigating a series of gruesome murders, Swansea police detective Harry Lambert discovers a clear link between the victims: they were all members of a paedophile ring. As the DI and his team delve further into the case, they are plunged into a seedy world of perpetrators, suspects, victims and vigilantes. Initially, the police believe the killer could well be a prior victim of the ring, or a redeemed abuser targeting former associates. But when a television producer becomes a suspect, DI Lambert discovers the motives are not as straightforward as they at first appear, and the answer lies buried somewhere deep in the past. As Lambert unearths the terrible truths about these horrendous crimes - in the process stirring up suspicions about his own family history - he discovers these are truths which could cost him his life...