As Rodney Middleton awaits trial, Detective Jack Warr is warned by his mentor DCI Ridley that they have only scratched the surface of the man's crimes. Then DCI Ridley is suddenly removed from his post. No one is to contact him - and no one will say why.

As Warr digs into Middleton's past, Ridley calls pleading for help, now accused of a murder he insists he didn't commit. To catch a monster and exonerate his friend, Warr must weed out the lies. But what awaits Warr if he uncovers the truth?