In the multi-story city "New Arcadia" in the year 2350, human beings are strictly divided by genes and wealth. Gu Jiyuan is a scrap mechanic living at the bottom of the city, barely making a living. One day, he accidentally activated a mysterious cube "Original Mechanical Core" in a high-tech garbage dump. The core is fused with his neural interface, giving him the ability to discern any mechanical upgrade path and infinitely enhance it with enough materials. From rusty cleaning robots, to abandoned security drones, to giant mechas that can destroy cities in the future, all machines are under his control. As his creations grew more powerful, he also attracted the attention of megacorporations, gangs, and the rulers of the city's shadows. Gu Jiyuan must use his god-level mechanical talent to carve his own legendary path from the dark abyss of Xiacheng District.