West Virginia: a church congregation vanishes in mysterious circumstances, only to be found dead some miles away. The evidence on the ground appears to indicate a ritual killing and the work of demonic forces. Enter Jessica Blackwood, the FBI's specialist in all things unusual. A former illusionist, Jessica's talent and experience enable her to see what others cannot, as she proved in the infamous 'Warlock' case. Maybe now, once again, the devil will be in the details.