Police psychologist Karen Warren (Kylie Travis) is stranded on a Texas highway when she accepts a lift from Frank (James Belushi) and Rayanne Lloyd. Frank and his wife row violently, and Frank ends up pulling out a gun and shooting Rayanne. Karen makes a run for it, and finds refuge in a military bunker. There she encounters a scientist who has perfected a time travel machine. Karen finds herself catapulted back into Frank's car, 20 minutes earlier. Can she alter events so that Rayanne is not killed?