While searching for suspects in the bombing of an abortion clinic, Sgt. Frank Matthews and his partner find themselves at the farm of Harlan Jackson, a Vietnam vet and Christian survivalist. After a search of his barn turns up something the police were not expecting, Harlan is taken in for questioning, along with the beautiful and mysterious young girl living with him who goes only by the name Hayden.

Washington, considering the bombing an act of domestic terrorism, dispatches Special Agents Rick Waltrip and Jim Hanson of the FBI to investigate. The Feds soon become more interested in the girl than Harlan, and the two of them are taken to a secret government installation in Utah under the guise of National Security.

All the while, the girl is being tracked by a man who goes by the name of Silas, who in reality is not a man at all but a ruthless and evil being who will stop at nothing to find Hayden and prevent her from accomplishing what she was sent to do. Hayden has managed to stay ahead of him up to this point, but now he's closing in. And fast.