In the fiftieth year since humans lost the ability to conceive naturally, Lin Xi approached the United Government and confessed: "I once had a child naturally with one of your censors." After verifying her physical condition, the government excitedly produced photographs of three men: "It was them." Lin Xi frantically waved her hands: "There weren't three of them-there was only one that night." The government replied, "But they were all at the bar you mentioned that day. So which one was it?" Lin Xi couldn't answer, because on that night of despair and recklessness, she hadn't seen the man's face clearly. In this post-apocalyptic world, cannibals disguised as humans mingle among the living, and only the government-trained Inquisitors can kill them. The Inquisitors are powerful and fearless, yet their constant killing has made them cold and ruthless-feared by all. No one knows that they, too, struggle in the darkness, at risk of being swallowed by it at any moment. Until one day, three of the strongest among them received the same message: "Return immediately. You may have a wife and a child."