Cleo plans to escape by keeping the prisoners under his control. Finally, on the day of the operation, Cleo, who was "transferred" to the medical office after asking Musca to examine his body, learns a secret of his body there. It was a fact he didn't know, but to his surprise, Cleo, who controlled the medical office for a short time, escaped as planned. Cleo, who survived the trap of the chief guard Seek and barely reached the mine shaft on the prison grounds, meets an old man in the deepest prison.