 David Mann ( Dennis Weaver (I)  (qv)) is just a regular family man on a business trip. Unfortunately, things go from bad to worse when a huge gasoline truck in front of him forces him to drive slower than he wants. As the drive continues, Mann realizes that he s not dealing with just another road hog. Though he can never see the trucker s face, the driver proves to be psychopathic, starting to run Mann off the road and trick or force him into a number of deadly situations. As the horrific trip continues, Mann tries to lose the truck, but each time he thinks he s finally in the clear, the truck returns to terrify him more. Finally, the horrific conflict builds to a point where he realizes that running won t save him, and that he must take a stand and fight back against the insane trucker.