The story follows (played by Kim Rae-won), a former police officer known for a 100% arrest rate who is incarcerated for hit-and-run and evidence tampering. Inside, he encounters Jung Ik-ho (played by Han Suk-kyu), the undisputed "kingpin" who rules the prison through a vast network of bribes involving the warden and guards.

: The prison is depicted not as a place of reform, but as a hub for flawless criminal operations where the system itself is the primary enabler of crime.

: Reviews were mixed but generally leaned positive toward the performances. Some critics from Rotten Tomatoes and IMDb praised the intense acting and suspenseful climax. Others, such as reviewers at the Los Angeles Times , found the plot generic or repetitive.

: Yoo-gun initially struggles as he is surrounded by criminals he personally put behind bars. However, his fearless nature catches the attention of Ik-ho.