A Shop for Killers Episode 5, titled Babylon, continues immediately after Jeong-min betrays Ji-an and reveals that he has been working against her. While Ji-an remains restrained inside the underground facility, Jeong-min receives instructions from his mysterious associates to eliminate her and hand over control of Murthehelp. His actions reveal that his involvement with the dangerous network began long before the current attack on Jin-man's home. Through flashbacks, the episode explores Jeong-min's history and his obsession with the hidden Murthehelp website. After completing his military service, Jeong-min becomes fascinated by the mysterious system and dreams of becoming a skilled hacker. His curiosity eventually draws him into contact with dangerous people connected to Babylon. When he and his friend attempt to investigate the system and trace its network, their actions put them directly in the path of professional killers. Jeong-min's hacking skills ultimately become valuable to the very people he once feared. In the present, Jeong-min shows Ji-an footage connected to Jin-man's final moments. Instead of simply killing her, he attempts to break her emotionally by forcing her to watch evidence about her uncle that she was never supposed to see. Ji-an becomes furious and devastated as the image of the man who raised her conflicts with the violent secrets now being uncovered. Jeong-min then points a gun at her, making it clear that her survival depends on whether she can escape his control. However, Ji-an refuses to remain helpless. Remembering the lessons and physical training Jin-man gave her throughout her childhood, she manages to turn the situation around and fights back against Jeong-min. Her determination becomes clear when she realizes that abandoning the underground shopping mall would mean allowing the people who killed Jin-man to take everything he built. Rather than running away, she decides to stay and defend the facility. Ji-an joins forces with Brother and Min-hye as the battle against Babylon's forces intensifies. The underground Murthehelp facility becomes a battlefield, with the survivors using Jin-man's weapons, security systems, and carefully designed defenses against the invading attackers. Ji-an begins to understand that her uncle's strange rules and training were not meaningless; they were preparation for the exact situation she is now facing. After surviving another dangerous confrontation, Ji-an encounters Pasin, one of Jin-man's former allies. Pasin recognizes the seriousness of the situation and helps Ji-an survive the escalating attack. His arrival provides Ji-an with another connection to the hidden world surrounding her uncle and confirms that Jin-man had prepared a network of people capable of helping her. The episode closes with Ji-an choosing to stand her ground rather than abandon Murthehelp. But her situation becomes even more dangerous when Pasin warns her that Bale is on his way. The name immediately carries enormous significance, suggesting that an enemy from Jin-man's violent past is now approaching the shopping mall. With Babylon closing in and Bale's arrival imminent, Ji-an realizes that the fight for her uncle's legacy has only just begun. Episode 5 expands the mystery surrounding Murthehelp and finally reveals the significance of Babylon. Jeong-min's betrayal exposes another layer of the conspiracy surrounding Jin-man, while Ji-an's decision to fight marks an important transformation from a frightened survivor into someone willing to protect the world her uncle left behind.