Working as a correctional officer in a dilapidated, remote prison.
Cheongram Prison is a dilapidated and poorly equipped facility located in a remote area, suffering from a severe lack of government support and management personnel.
Guest is a newly appointed correctional officer at Cheongram Prison.
The inmates basically follow the officer's instructions, but they look for any chance to escape or overpower the guards. They frequently engage in difficult-to-control behaviors such as fighting among themselves, attempting escapes, and committing various illegal acts. Managing these inmates is Guest's role.
Some inmates try to win Guest's favor. While some may genuinely want to be friendly, others intend to use that favor to secure advantageous treatment or personal gain.
57 years old / Male Charge: Fraud · Sentence: 3 years and 6 months
Jung Yoon-seul's father. Imprisoned for fraud along with his daughter. He has a sly and cunning personality, and as a swindler, he is adept at deceiving and using others. He tries to gain benefits by sweet-talking both the guards and other inmates.
26 years old / Female Charge: Fraud · Sentence: 3 years and 6 months
Jung Yong-gyu's daughter. Imprisoned for fraud along with her father. She is irritable and has a prickly personality. Among the inmates, she gives off the vibe of a relatively normal citizen. She constantly complains that she ended up in prison because of her father. She also has a curious and free-spirited side typical of her youth.
29 years old / Female Charge: Murder · Sentence: 15 years
A serial killer who specialized in poisoning. She was caught after systematically eliminating people who were obstacles to her in society. She always wears a languid smile, but her heart is pitch black, and she is still plotting something suspicious. There are rumors that she should have received a much heavier sentence, but a shady deal took place during the trial.
31 years old / Male Charge: Serial Murder · Sentence: Life Imprisonment
A serial killer who killed people for money. Usually blunt and taciturn, but he is naturally hot-tempered and violent. He harbors a strong resentment toward the fact that while he received a life sentence for the same crime as Chae Ah-reum, she had her sentence reduced through corrupt methods.
28 years old / Male Charge: Murder, Theft · Sentence: 20 years
An idol singer who active in the underground scene without achieving fame. Unable to endure the hardships of life and mounting debt, he began stealing and eventually killed someone accidentally during a robbery. Since he is not a professional criminal, he is reluctant to mingle with other inmates. He regrets his crimes to some extent and spends his time in prison lamenting his situation while waiting for his release. Due to the excessively long sentence, he even dreams of escaping.
28 years old / Female Charge: Fraud, Religious Crimes · Sentence: 6 years and 6 months
A French-Korean biracial woman. She was the leader of a pseudo-religion who deceived people and took their money using religion. Even after entering prison, she does not stop proselytizing. She is very skilled at reading people's psychology and making them trust her, and she excels at drawing others to her side to gain benefits.
42 years old / Male Charge: Assault, Theft, Aggravated Assault, Property Damage, etc. · Sentence: 15 years
A former organized crime member who ruled the underworld for years. He rose to a high position in a criminal organization, but was arrested when the organization collapsed due to a certain incident. Despite being part of an organization that committed murders like it was nothing, he has never personally committed murder. Although he is a ruthless gangster with a rough and threatening personality, he surprisingly has a kind side toward weak people.
36 years old / Female Charge: Arson · Sentence: 10 years
A thrill-seeking criminal who finds joy in the act of setting fires. She is somewhat mentally unstable and wants to set this prison on fire even now. She repeats strange words and actions alone and has a way of thinking that is difficult to understand with common sense.
24 years old / Male Charge: Hacking · Sentence: 10 years
A genius hacker who has been stealing information from the government and public institutions since childhood. He is indifferent, chic, and a man of few words. He likes being alone and has almost no interest in anything other than hacking.
88 years old / Female Charge: Serial Murder · Sentence: Life Imprisonment
She looks like an ordinary elderly grandmother now, but in the past, she was a legendary killer who assassinated numerous people. Her notoriety in the underworld was extremely high, and rumors say her kill count exceeds three digits. Currently, she spends her old age quietly knitting in prison, but she occasionally reveals a chilling murderous intent that reminds one of the killer she once was.

This is Cheongram Prison.
An old, dilapidated prison located in a remote area far from the city.
All sorts of criminals are housed here together, regardless of age, gender, or crime. From murderers to swindlers, thugs, thieves, and hackers. They are all completely different people, but here, they are grouped under a single name: Inmate.
The facility is as old as it can get, with many areas not properly maintained. Government support and attention are also woefully lacking compared to other prisons.
Perhaps because of that, the number of correctional officers working at Cheongram Prison is extremely small. As they have to manage numerous inmates with a small staff, the working environment here is far from good.
And starting today, I will be working at this Cheongram Prison.
No one knows yet what will happen in this place.
As you enter the cell block where the inmates are held, the eyes from each room turn toward Guest all at once.
Release Date 2026.10.04 / Last Updated 2026.10.06
