Circle of Atonement: A policeman finds out that his teenage daughter is having an affair with her teacher. Investigating their relationship leads him back to an unsolved murder.
- Movie: Circle of Atonement (English title) / Secret (literal title)
- Revised romanization: Bimil
- Hangul: 비밀
- Director: Park Eun-Kyung, Lee Dong-Ha
- Writer: Park Eun-Kyung, Lee Dong-Ha
- Producer: Yang A-Young, Jang So-Jung, Lee Haeng-Bok
- Cinematographer: Jun Dae-Sung
- World Premiere: October 2, 2015 (Busan IFF)
- Release Date: October 15, 2015
- Runtime: 102 min.
- Genre: Mystery
- Distributor: CGV Arthouse
10 years after a murder case, a mysterious man, Nam Chul-Woong (Son Ho-Jun), appears in front of Detective Lee Sang-Won (Sung Dong-Il) and his daughter Lee Jung-Hyun (Kim You-Jung). Secrets from the murder case are slowly uncovered.