In the giant city "Yongyao City" in 2333, the world was divided into two extremes. The wealthy elite live in the glamorous upper city, while the vast majority of the lower class people struggle to survive in the polluted and crime-ridden lower city. Ling Tianyu, a young scavenger and mechanic from the lower city, runs around all day in order to survive and pay for his sister's high medical expenses. During a dangerous scavenging trip deep into the "forbidden zone" - the ruins of an old civilization - he accidentally awakened a dormant pioneer artificial intelligence "center". The "center" gives him the ability to analyze, reconstruct and infinitely evolve any mechanical creation. His first project was his shabby scavenger mecha "Scrap Iron". Starting from a pile of rusty garbage, Ling Tianyu embarked on an unstoppable path to rise. He transforms the Scrap Iron into a god-level war machine, challenges the oppressive corporations that rule the city, uncovers the secrets behind the disaster that destroyed the old world, and strives for a better future for the people of Lower City. This is the legendary story of an unknown person who was born in a slum and gradually grew into a god of machines.
