On August 6, 1945, the Enola Gay drops the first atomic bomb on Hiroshima, and this film reconstructs the hours around that moment almost minute by minute. It moves between the Potsdam Conference, where Truman, Churchill, and Stalin negotiate the war's endgame while the Manhattan Project waits in the background, and the cockpit of the bomber itself, using firsthand accounts from the air crew alongside Japanese survivors who describe the city disappearing in seconds. The documentary lays out the technical mechanics of the weapon, from its design and assembly to the physics of the blast, without losing sight of what that physics did to the people underneath it. Historians walk through the military reasoning that led to the target selection and the timing of the strike, weighing the strategic case against the human cost that follows. The result is a detailed timeline of one of the twentieth century's defining decisions, told through the people who gave the order, carried it out, and survived it.