Near the small desert town of Santa Ynez, a mysterious black car runs down two teenage bicyclers en route to camp, then it hit-and-runs a hitchhiker with local Amos Clements as witness. Sheriff Everett puts his men on alert and plants road blocks in the area to arrest the murderer, but soon he himself falls victim to the car. Sheriff Wade Parent leads the hunt for the vehicle that threatens their town and seems impossible to locate. When his beloved girlfriend, teacher Lauren Humphries, challenges the driver in a cemetery, the car hunts her in her home. Wade realizes he might be dealing with supernatural powers.