End of the line

A simple train journey home one evening twisted his entire world upside down. He didn't know what was real and what was a dream. Strange doorways, white rooms, a desert island, visions from his former life. The strangest part of all was the sign... What did it mean? He had to Survive, his mind was being ripped apart from the inside. Could it be self-sabotage? Were his actions and behaviors part of a drug or virus taking over his body, could it be post-traumatic stress? From his life in the special forces, or his situation with MI6? He needed to get it together before he lost everything he knew and loved.Little did he know he was heading into something more dangerous than any mission.....His mind!