One year after the death of his mother, Mark's brother is found viciously tortured and mutilated in his home. The killer vanishes, leaving behind only a simple tag. Mark is one of the first responding officers on the scene, but the sight of his brother's body forces him to abandon his career as a police officer.
Against all odds, Mark's prayers are answered when the murders begin again, and each one is more drawn out and brutal than the last. This is what Mark has been waiting for, and as the evidence starts to come in, he becomes desperate to reach the killer first, intent on exacting his own justice for his brother's murder. Putting himself into the killer's head blurs the line between fact and fiction. Things spiral as Mark is tormented with blackouts, memory loss, and nightmares. The closer he comes to the killer, the more he pushes, and the more he pushes, the more frantic the killer becomes. It's a game of cat and mouse that was doomed from the beginning.
In the end, finding the identity of the killer could be the end of Mark and the beginning of a whole new evil.