At the outset of the Yalta Conference on February 4, 1945, the «Big Three» were all optimistic: victory was in no doubt, and the accord that they had achieved seemed likely to preserve the values they had fought for. However, in just a few months, nothing would remain of this agreement apart from irreconcilable differences. United in war, the Allies would reveal themselves as divided and rivals in peace. How can such a rapid failure of a real effort at entente be explained? With the Yalta Conference in 1945 to 1953, discover a new world order drawn up by three men, looking for a lasting peace... that would lead inevitably to the Cold War. Combining archive footage, photographs, original letters and unique testimonies, these two episodes revisit this crucial period in History. A full immersion into postwar years and an emerging new world order.