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. A few hours later, when Rafferty vanished, Wilcox and his fellow troopers knew the car was worse than dangerous.