Mallory Rutledge is driving her fiancé's truck to Denver to meet him and get married. While driving in the lonely road, she talks to her sister Ella and decides to take a detour to visit the Grand Canyon. Out of the blue, the truck stops and Mallory can get no service in her cell phone. However the gentle drifter Christian Laughton offers to fix the car and Mallory accepts. Then she offers a ride to him and when she is driving, he says pornography to her. She asks him to leave but he shows a knife and tells her to go to a derelict motel. Mallory sees that the psychopath Christian is not wearing the seat bell and decides to throw the truck off the road in a curve. But the leg of Mallory is trapped in the overturned car and Christian leaves her without any help, in the beginning of Mallory's worst nightmare. Will she escape from the vehicle and from the psychopath?