The state police of Troop D in rural Pennsylvania have kept a secret in Shed B out back of the barracks ever since 1979, when Troopers Ennis Rafferty and Curtis Wilcox answered a call from a gas station just down the road and came back with an abandoned Buick Roadmaster. Curt Wilcox knew old cars, and he knew immediately that this one was ... wrong, just wrong. A few hours later, when Rafferty vanished, Wilcox and his fellow troopers knew the car was worse than dangerous -- and that it would be better if John Q. Public never found out about it.