"The Prison" is a 2017 South Korean action thriller film directed by Hwa-dong Kim and written by Kim Hwa-dong and Lee Hyun-woo. The film stars Choi Woo-shik, Kim Hye-soo, and Kim Joo-hyung in the lead roles. The story revolves around two men, Jaeyool (played by Choi Woo-shik) and Jinho (played by Kim Joo-hyung), who are mistakenly identified as the prime suspects in a murder case. The two men are then kidnapped and taken to a secret prison, where they are subjected to physical and mental torture.