Lin Yue traveled through the wasteland after the nuclear war and bound to the [Civilization Restart System]. While others were picking up garbage and fighting for half an expired can, he was already signing in to get the machine tool blueprints and rubbing AK47s. When the tide of mutant beasts came to the city, the enemy laughed at the vulnerability of his earthen wall, but saw the steam engine-driven repeating machine guns spitting out tongues of flame on the city wall. From water purifiers to nuclear power plants, from barbed wire to starships. This is the story of an engineer who uses the modern technology obtained by signing in to rebuild human civilization in the wasteland, and finally reveals the truth of destruction and walks towards the star sea.