The frozen human Lin Jin woke up in the giant nest city "Rust Paradise" controlled by the Soros consortium, but became an experimental subject. During his escape, the deadly symbiote "Corrosion Bacteria" parasitized his spine, giving him violent power and the brand of "root pupil", and also brought severe pain that tore his will. He was hunted by the consortium, coveted by the resistance organization "Rusty Fire", and even regarded as a bargaining chip by the mysterious leader Dad. Lin Jin, who has been reduced to a walking key, must struggle to survive between the devouring of the cold will of the armor and the fatal temptations of all parties, and explore the slim hope of controlling the brand and tearing apart the iron curtain of the consortium. Every step is a desperate battle between humanity and monsters.
