'The boy who had been abused and strangled in that hideous little room looked so like her, he could have been her brother..' A teenage boy is found mutilated and murdered in a Glasgow flat. Forensic scientist Rhona Macleod is called to the scene, but her grim task is made even more unsettling than usual by the boy's remarkable resemblance to her -- and the fact that she gave up a baby boy for adoption seventeen years before. Racked with guilt, she sets out to find the boy's killer and determine whether he is her long-lost son -- but in doing so, she immerses herself in the sinister world of an internet paedophile ring. Some very powerful men have a lot to lose if she succeeds, and everything to gain if she dies.