As an "ornamental fish" raised by a top chaebol family, Qi Shu lives in a carefully monitored glass tank, and his daily mission is to please his owner with his beauty and gentleness. Until the night when his family was destroyed, the mansion where he was imprisoned burst into flames. A strange man broke the glass and stretched out his hand to him in the light of the sky. Later, Qi Shu learned that the person who rescued him was called Lu Chen, a "scavenger" who made the entire underground world tremble, and it was his hand that caused the family's downfall. Lu Chen gave him a new cage, but also gave him a night sky he had never seen before. He taught Qi Shu how to use a knife, taught him how to break free from chains, and then coaxed him in a low voice: "Good boy, now go and kill all the people you hate." Qi Shu clenched the blood-stained dagger, looked back in the morning light, and for the first time saw clearly the undisguised, crazy light called monopoly in the "breeder's" eyes.