然而，就在天皇在御前會議作出最後決斷，到正式播送《終戰詔書》前的24小時內，政變派突然採取行動，8月15日凌晨，《終戰詔書》錄音剛結束，反對投降的畑中少佐（松坂桃李）率軍起義，刺殺近衛師團長森赳，發佈偽造的師團命令，進而佔領皇居及電台。在終戰前一夜，歷史幾乎被徹底改寫…… July 1945. As the Pacific War was in its final stages, the Allies demanded the acceptance of the Potsdam Declaration* by Japan, which had lost any hope of winning the war. Surrender or fight the Decisive War at home? The cabinet debates day and night, but the controversy only escalates. In the face of Japan’s silence, the U.S. drops atomic bombs on Hiroshima and Nagasaki as the final blows, taking hundreds of thousands of lives. An imperial meeting is convened at noon on August 14 and the cabinet accepts the Emperor’s decision to surrender. What was the fate of Japan that changed with every second during the longest day in its history—from when the cabinet made the decision to when the Emperor personally made a radio announcement declaring the end of the war at noon on August 15?