June, 1942: As the German blitzkrieg stalls in Russia, Hitler’s behavior becomes increasingly eccentric. The German High Command (OKW) suspects Hitler is insane and approaches Carl Jung to request an evaluation of The Fuehrer’s mental state. Neither the OKW nor Carl Jung know that his close associate, Mary Bancroft, works for American spymaster Allen Dulles. Bancroft and Dulles urge Jung to enter Nazi-occupied Austria, into the Mouth of the Lion, and extract Hitler’s darkest secrets.