A crack in the sky came to Changshan in the late Han Dynasty, and alien species besieged the isolated city of Zhending. Only remnants of soldiers, refugees and fifteen days of food were left in the city. Lin Jin, a modern man, takes over the isolated city system, making choices between food, water, pollution and strange tides, awakening generals with military exploits, and rebuilding the city defense with hope. Zhao Yun has not yet become famous, Han Que defends the north gate, and Shen Zhen treats the injured. If the lonely city is destroyed, there will be no retreat in the world.
