Cao Junting, a civil engineer who died suddenly while working overtime, traveled to a wasteland world three hundred years after a nuclear war. When he opened his eyes, he was in a desperate situation: there were only three days of food and grass left, the shelter was dilapidated and leaking, mutated gerbils were watching outside the door, and radiation dust was everywhere. Just when he was on the verge of despair, the wasteland infrastructure system was activated, and he could get rewards as long as he built. Starting from repairing an abandoned water purifier, he lit up the technology tree step by step and reestablished civilized order. Build walls, connect power grids, cultivate farmland, and expand dilapidated shelters into steel fortresses. Facing the iron hooves of predators and the impact of mutant beasts, he used infrastructure as a spear and the system as a shield to find a way out of the desperate situation. When the first radiation-resistant wheat eared in the wasteland, when the first sentry tower pierced the gray sky, Cao Junting stood on the high wall, igniting the rebirth of human civilization.