On August 6, 1945, a single bomb destroyed Hiroshima in seconds, and this episode from History Hit's Hiroshima series rebuilds that morning through the people who lived it. Survivors describe a heatwave estimated at 4,000 degrees Celsius, the toxic black rain that fell afterward, and the radiation sickness that kept killing for years after the blast itself ended. Medical personnel recall treating injuries with no precedent and no real means of care, while crew members of the Enola Gay give their side of the mission from the air. The film moves from the immediate devastation to the Nagasaki bombing three days later and the surrender of Imperial Japan that followed, tracing how one weapon reset the terms of global warfare. Firsthand testimony carries most of the runtime, with narration used mainly to place events in sequence rather than editorialize. The result is a ground-level account of nuclear war's human cost, built from the memories of the people who were there.