(2017) — The Prison

: Yoo-gon’s true goal is to gain Ik-ho’s trust to expose the syndicate and uncover the truth behind his journalist brother's death. Key Characters & Cast

: The ruthless, calm, and manipulative "King" of the prison who controls everyone within the walls. The Prison (2017)

is a South Korean action-crime thriller that follows an undercover detective who enters a high-security penitentiary to dismantle a crime syndicate operating from within. Directed by Na Hyun , the film is known for its gritty atmosphere and high-stakes power dynamics. Core Premise & Plot : Yoo-gon’s true goal is to gain Ik-ho’s

: An intelligent and reckless ex-cop on a dangerous undercover mission. Directed by Na Hyun , the film is

: Under Ik-ho’s leadership, prisoners are allowed to leave the facility at night to commit high-profile crimes—including murders, heists, and blackmail—before returning to their cells, providing them with a perfect alibi.

: A high-ranking official involved in the prison's corrupt administration. Film Production & Reception The Prison (2017) - IMDb

The story centers on (Kim Rae-won), a former elite detective known for his 100% arrest rate. After being sent to prison for a hit-and-run accident, he discovers that the entire facility is actually a headquarters for a crime empire.