Jim Halsey, portrayed by C. Thomas Howell, embarks on a frantic journey as a young car delivery driver, transporting a vehicle from Chicago to the sun-soaked streets of San Diego. Along the way, he makes a fateful decision to pick up a hitchhiker named John Ryder, played by the intense Rutger Hauer. At first, Ryder seems like a quiet, enigmatic man, but the atmosphere quickly grows tense when Jim passes a car stranded on the side of the road. In a chilling moment, Ryder's demeanor takes a sinister turn as he chillingly claims responsibility for the brutal murder and mutilation of the stranded car’s driver, and ominously warns that Jim will be next.
With a cold precision, Ryder pulls out a switchblade, taunting Jim with the intention of inflicting the same gruesome fate. In a split second of survival instinct, Jim realizes Ryder hasn't buckled his seatbelt, and with a swift maneuver, he knocks Ryder out of the car. Sighing in relief, Jim resumes his journey, but his sense of safety is short-lived. Horrified, he witnesses Ryder hitching a ride with a family in a station wagon. Desperate to save them, Jim attempts to signal for help, but in his panic, he nearly wrecks his own vehicle. When he finally reaches them, he finds the family horrifically mutilated at the hands of Ryder.
As the narrative spirals into a relentless chase, Jim becomes the target of Ryder's menacing pursuit. It becomes clear that Ryder, intrigued by Jim's earlier act of defiance, has chosen him as worthy prey for his next kill. The chase takes a dramatic turn when Jim finds himself at an abandoned gas station where Ryder, in a fit of destruction, crashes into the gas pumps before igniting a fire that engulfs the station. Narrowly escaping the inferno, Jim takes refuge in a diner, where he meets the alluring waitress Nash, portrayed by Jennifer Jason Leigh. As he tries to call the police, a mundane moment of enjoying a burger turns grotesque when Jim discovers a severed finger in his fries, realizing Ryder is still nearby.
In a shocking twist, instead of receiving help, Jim is arrested by the police, framed by Ryder who has sneakily dropped Jim's wallet at a murder scene. After a harrowing time in jail, Jim awakens to a nightmarish quietness, escaping to find the bodies of murdered officers, leading him to panic and commandeer a gun. Stumbling upon another payphone, he desperately takes two unsuspecting officers hostage, hoping they will believe his plea about Ryder. Just when he thinks he's making progress, Ryder's shadow looms once again, resulting in the brutal murder of the officers he'd held captive.
The plot thickens as Jim and Nash embark on a heart-pounding escape, but their luck runs out when they find themselves cornered by the police, who, furious about the earlier fatalities, believe Jim to be a menace. Amid this chaos, Nash's bravery shines through as she points a gun at the officers, and together, they flee. They manage to evade the police with sheer ingenuity, but Ryder’s relentless pursuit continues, culminating in a deadly showdown at a roadside motel where he kidnaps Nash, threatening her life to draw Jim out.
Desperate to save the woman he has come to care for, Jim confronts Ryder, who chillingly demands that Jim take his own life to spare Nash's. But Jim, standing firm, refuses, setting off a sequence of events that lead to a tragic outcome as Ryder outmaneuvers him, ultimately leading to Nash's demise. A whirlwind of police becomes involved, though none can seem to identify the malicious Ryder, who appears to exist beyond their grasp.
In a climax filled with tension, Jim manages to confront Ryder one last time during a transport gone awry. Seizing the chaos to his advantage, Jim finds himself in a heart-stopping battle. As seemingly all hope is lost, Jim executes a daring maneuver to eliminate Ryder once and for all. In a final confrontation that tests his limits of fear and bravery, Jim fires upon Ryder, ensuring that his tormentor cannot resurrect. Alone in the deserted landscape, with the sun setting in the distance, he ignites a cigarette, a somber reminder of the harrowing ordeal he has faced, now left to contemplate the shadows of his past.
