Some victories come at a high price.

For Kyle Fasano that price is a headlong fall into hell, a place he never really believed in. Now a living soul trapped in a land of death and terror, he desperately seeks escape, but he's about to learn that the worst place of all can be the hell that lives inside us.

Some defeats are met with shock and defiance.

For the Gray Man, the loss of his charge is more than he can take. In a million-to-one leap of faith, he goes after Kyle to try and save him, knowing full well that, as an agent of heaven, the effort is most likely suicidal. Napoleon Villa volunteers to help, and they descend into the depths to discover horrors that neither of them could have imagined.

Some wars are fought with sheer determination.

Back in the real world, Tamara Fasano and her children are hunted by demons determined to make her husband pay for his victory, while Napoleon's partner, Detective Evan Parker, is drawn into the hunt for a psychopathic serial killer who is terrorizing the small town of Beaury, California.