Circle of Atonement (Korean: 비밀; Hanja: 秘密; RR: Bimil; lit.

Secret) is a 2015 South Korean mystery drama film starring Sung Dong-il, Son Ho-jun and Kim Yoo-jung, and directed by Park Eun-gyoung and Lee Dong-ha.

The film premiered at the Busan International Film Festival on 2 October 2015.

[2] It was released in theaters on 15 October 2015.

[3] Detective Lee Sang-won (Sung Dong-il) and his daughter, Lee Jang-hyun (Kim Yoo-jung), meet high school teacher Nam Chul-woong (Son Ho-jun) and discover common ties to a tragic murder case that happened 10 years earlier.