This is the story of a face-off that pitted the two most powerful men on the planet for eight years: Stalin, the leader of the Soviet Union, and Truman, the president of the United States. This confrontation held the world in suspense and led them to the cold war. This film recounts this pivotal period in our history. A period of high tension, while the United States and the USSR acquired atomic weapons. Until the death of Stalin in 1953, crises followed one another. Thanks to declassified archives, the exceptional testimonies of former spies and President Truman's grandson, we relive the story from the inside and understand how the terrible spiral of the Cold War was put in place.