This was an apocalyptic world where resources were severely short in supply. The rich had taken all the advanced technologies and departed to another planet richer in resources, while the poor had been abandoned in this world. As the more advanced technologies had been taken away, the world while it had very high-level theoretical knowledge had no technologies to support it. When Luo En transmigrated here, he immediately saw a mobile city. But the strange thing was that the mobile city's engine was powered by steam. He also discovered at the same time that he was actually a City Lord, and this was actually his own mobile city! Unfortunately, just a while ago, his mobile city had been discovered by another mobile city much larger than it. And it was actually being pursued right now. Just as Luo En was feeling nervous, the infinite "City Lord System" was awakened in him. All he needed to do was to devour resources in order to gain the Evolution Points required to evolve the mobile city. Luo En immediately devoured the ore resources in his city and evolved its engine. Then he went crazy with the boosted speed of the city, escaping from his pursuers and surviving in this world…