DCI Gabriel Markham and his team are working to find a serial killer, when a break in thecase leads them to a potential culprit.

Gabriel comes face-to-face with the prime suspect in the serial murders, but his deep,personal connection to the case could risk jeopardizing his career.

Another body is discovered, but Gabriel is pulled away from the case by a personalmission that strikes straight to the heart of his family.

With pressure mounting from all sides, the killer’s sights turn towards Gabriel and thetension ratchets up as the hunter becomes the hunted.

As Gabriel’s investigation is lent a helping hand, the story of the acid murderer’s firstvictim is revealed, and another suspect enters the frame.

Following Gabriel’s discovery of a crucial piece of evidence, the hunt is on to track downthe killer as the truth is finally pieced together.