In the wasteland of nuclear war, the whole city is without food, and tens of thousands of survivors are so hungry that they are chewing tree bark. Xie Zhao was kicked out of the shelter because he insisted on repairing the scrapped Dongfanghong tractor. Everyone called him a lunatic and a waste—until he transformed a tractor engine into a plasma furnace and produced three hundred tons of grain reserves in one night. No one knows that under the chassis of this broken tractor, there are secrets that can unlock the entire industrial civilization. Three days later, when the tide of steel zombies flattened the city wall, Xie Zhao unscrewed the last screw, and the thirty-meter-high deformed agricultural machinery tore apart the horizon. The whole city knelt down and begged him for a piece of scrap metal.
