Unstoppable-locandinaVeteran Allegheny and West Virginia Railroad (AWVR) engineer Frank Barnes (Denzel Washington) oversees his co-worker, freshly hired conductor Will Colson (Chris Pine) as they use AWVR locomotive #1206 to run a train outside the fictional city of Stanton, Pennsylvania.

Meanwhile, AWVR hostlers, Dewey (Ethan Suplee) and Gilleece (T.J. Miller) are ordered by dispatcher Bunny (Kevin Chapman) to move a freight train led by locomotive #777 off its current track. To speed up the short trip, Gilleece leaves the hoses for the air brakes disconnected. Dewey leaves the moving cab to throw a misaligned rail switch, but is unable to climb back on, and the train’s throttle jumps to full power. The unmanned train speeds down the main line toward Stanton…