Shin Ha-kyun as Lee Byeong-gu

Baek Yoon-sik as Kang Man-shik

Hwang Jeong-min as Su-ni

Lee Jae-yong as Inspector Choo

Lee Joo-hyun as Detective Kim

Gi Ju-bong as Squad Leader Lee

Kim Dong-hyun as Tae-sik

Kim Kwang-shik as Detective Seo

Won Woong-jae as Detective Jang

Ye Su-jeong as Mother

Jeong Bo-hun as Ji-won

Kim Roi-ha as Jailer

Son Jin-hwan as Factory Manager

Park Sung-min as Adam

Son Jong-hwan as Su-ni's Father

Kim Ki-cheon as Hospital Staff

Lee Mu-hyeon as King

Jung Jae-jin as Noah

Kim Young-chan as Young Byeong-gu

Min Yun-jae as Woman Detective

Lee Seung-chan as Teacher

Lee In-hui as Hospital staff