After being electrocuted, Lin Yu, a college student from the Department of Mechanical Engineering, traveled through the underground wasteland and became the weakest low-level iron puppet.
In this ruthless underground world, puppets eat each other, the weak eat the strong, the crystal core is king, and the weak will only be torn to pieces, devoured, and completely corroded and destroyed. No one knows that this weakest puppet underground will eventually ascend to the mechanical throne of the entire wasteland!
