On August 15, 2077, the leaders of the three most powerful countries of Blue Star gathered in Tianjing to sign the Memorandum of Understanding on Nuclear Weapons Destruction. The memorandum envisages the destruction of all nuclear weapons currently in Blue Star's current stockpile over a period of 10 years. From then on, Bluestar will enter the post-nuclear era, and all nuclear physics research will be reversed to nuclear energy development. Human society has moved from nuclear checks and balances to pulse checks and balances! On September 16, 2077, Ankara's nuclear arsenal was controlled ...... The control process got out of control, and the missiles flew directly to the other two countries. Vorster and China reciprocally counteract, and the nuclear war has officially begun! In order to prevent other countries from taking advantage of the fisherman's profits, nuclear bombs indiscriminately attack major metropolitan areas, and human civilization is about to end. Half a year later, nuclear winter came. The long darkness lasted for seven months, and it was not until the following summer that the dust from the atmosphere slowly descended to the ground. The sun reappeared in the sky, and humanity had not been happy for long, but found that famine had come...... This great change is known as the cataclysm, and mankind has begun a long road of civilization reconstruction! ......