What if every supernatural or conspiracy story you ever heard happened to be true? In 1952, when Ron Durston is called up into the army for National Service, all he wants is to be posted somewhere sunny like Tahiti or Weymouth where he can fraternise with the native girls and bring home a medal or two to impress his mates. Instead he finds himself standing guard at an army camp in Ass-End, Yorkshire, which is of far more interest to Nazis in flying saucers than it is to him.