Hullumeelsus plot
During World War II in German-occupied Estonia, a man knocks on the door of a hospital for the mentally ill. When he is taken to the doctor, he tells him that he must unmask an English spy who is said to be among the patients. The man, Gestapo officer Windisch, must complete his task before the Soviets reach the isolated home in the middle of the woods. However, it turns out not to be easy to distinguish the crazy from the non-crazy.