From 1947 to 1990, the Military Liaison Missions of France, UK and the US to the Soviet High Command in Germany, were positioned behind the Iron Curtain, in order to be able to closely observe Warsaw Pact Forces stationed in East Germany. How was it possible for adversaries to be so close for so long? How did each side feel about it? Rich in eyewitness accounts illustrated and supported by extraordinary documents shot films, photos and audio and video recordings never seen in public before that is the story this film aims to shed light on.