Casualty (2015)

WW2 - Seth's son gives him a gold coin for good luck in the hope that he will return from war save and sound. In Algeria, under extreme conditions, Seth commits an unspeakable act. Unable to deal with what he has done, he finds himself bound by guilt and haunted by his actions. The only link to his nightmares being the gold coin his innocent son had given him. Trapped in some kind of purgatory and unable to wake up, Seth feels that he has turned away from and can never face that, which was once precious to him... his son.