 After their new Jeep conks out on a desolate stretch of Arizona highway, a well-heeled Massachusetts couple accepts the help of a kindly, honest-seeming trucker, who drives the wife to a diner while the husband stays behind to "protect" the vehicle. After saying goodbye, the husband gets two surprises: the Jeep starts, and his wife never actually arrived at the diner, and the trucker doesn t recollect having picked her up at all...