给我8分钟，我去拯救世界.不到一杯咖啡冷却的时间.为什么是8？因为，...(2)

U.S. Army pilot Captain Colter Stevens wakes up on a Metra commuter train going into Chicago. Stevens is disoriented, as his last memory was of flying a mission in Afghanistan. 

However, to the world around him – including his friend Christina Warren and his reflection in the train's windows and mirrors – he appears to be a different man: a school teacher named Sean Fentress. As he expresses his confusion to Christina, the train explodes while passing by another train, killing everyone aboard.