But there is trouble at home, Travis's beautiful and talented wife has just confessed that she does not share his deeply held faith, and their son, Kevin, begins manifesting alarming signs of repressed anger. Then, an unseen foe enters their home. WIth the ability to watch without being seen and destroy without being discovered, he is the family's worst nightmare. But the calls, too, have some formidable gifts, and the hunter may become the hunted.
Unfolding in the remotest parts of the Grand Canyon, a conflict between faith and darkness will determine more than the fate of a family. It may determine the truth, or falsehood, of a religion.