A bomber who has just destroyed a train plans to kill thousands more with a much larger detonator in the heart of Chicago within hours. A top-secret program allows an initially mystified Captain Colter Stevens to exist briefly as another man in the parallel reality of the doomed commuter train. Each time he returns to the train, Colter has just eight minutes to uncover the bomber’s identity. The more he learns, the more convinced the soldier becomes that he can prevent the deadly blast from ever find out more...