An off-duty SAS soldier, Tom Buckingham, must thwart a terror attack on a train running through the Channel Tunnel. As the action escalates on the train, events transpire in the corridors of power that may make the difference as to whether Buckingham and the civilian passengers make it out of the tunnel alive.

Aaron's father's funeral is today at the family home, and everything goes wrong: the funeral home delivers the wrong body, his cousin accidentally drugs her fiancé, and Aaron's successful younger brother, Ryan, flies in from New York, broke but arrogant. To top it all off, a mysterious stranger wants a word with Aaron.