Prison (2017) — The

: An intelligent and reckless ex-cop on a dangerous undercover mission.

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 The Prison (2017)

: 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 : An intelligent and reckless ex-cop on a

: A prominent inmate and part of Ik-ho’s inner circle. Core Premise & Plot : Yoo-gon’s true goal

: 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.