A twisty, scary serial killer thriller. Make sure you don't read this alone at night!

He's tracking people down one by one. And you're next on the list...

A woman arrives at the police station in the dead of night. In her hand is a bag full of DVDs. Close to tears, she explains she was clearing out her husband's office, and found these in the safe. 'They're... people,' she says, then disappears.

DCI Cara Elliott watches the videos and makes a horrifying discovery. This is killing on demand. A list of requests, money paid, videos made. And then a body turns up, killed to the exact specification of the order next in line.

It's a race against time, and the stakes are all too clear. They need to track the murderer down before he kills again. But next on the list? A police officer - killed and tortured, live on film. And suddenly the hunters have become the hunted...