Sometimes it's not the devil you know...

When the disfigured body of a missing teenager is found in an unmarked grave in northern Maine, FBI agent Gus Wheeler and his partner arrive to investigate. They discover a second grave, but these remains are so badly burned, identification proves difficult. Yet the two bodies have something strange in common: a large lead cross laid upon each chest.

The locals are uncooperative, and the rural law enforcement is two steps behind. Enlisting help from a theology and biblical studies expert, they discover the murders are lifted straight from ancient scripture and the burials consistent with an archaic religious practice. Connecting the victims to a specific church adhering to a strict doctrine of the Old Testament creates more confusion than clarity.

As the investigation widens, the agents face threats and suspicion. Then someone inside the church begins leaving them clues, but are they friend or foe? With time running out, Gus must determine if their secret guide is leading them toward the answers or deeper into an underworld of twisted dogma and ancient rituals.