In Xinhai, a futuristic city where classes are solidified, Lin Yuanfan, a low-level scavenger, spends his days digging through mountains of garbage in order to treat his sister's illness. By accident, he discovered a mysterious energy core. When he combined it with his broken scavenger mecha "Black Hole", a miracle happened. This old mecha not only repairs itself, but also displays the terrifying ability to devour metal and evolve itself.
From out-of-control drones in abandoned factories, to bully gangs in downtown areas, to underground mecha leagues regarded as "gladatories" by the upper class... Lin Yuanfan drove the ever-evolving "black hole" from the bottom of society, breaking down class barriers step by step, and finally revealed the shocking secrets behind the world and the mysterious core. His journey is a poem of steel and flames, as well as an epic of the rise of a low-level man.
