Ling Shuang used to be a low-ranking garbage worker at the Seventh Recycling Station. Gu Fei tortured him as a test subject, and to survive, he took out an “Origin Loan” to obtain a “Mutated Viper Body.” He repaid the initial debt with the lives of ten guards, but the price was that he had only 29 days left to live. After escaping the recycling station, Ling Shuang was marked by Gu Fei with “Ghostlight Spores,” making him a target for the mutants in District D and the pursuers on his trail. Driven into a corner, he struck a deal with the mysterious weapons expert A Jiu: together, they would hunt giant rats and harvest their cores to prolong his life. Once his hearing returned, Ling Shuang swiftly fought back against his pursuers and uncovered Gu Fei’s scheme. At last, he declared war on Gu Fei over the comms, setting a deadly game of hunting, survival, and revenge in motion.