Two friends in the past were victims of serious school bullying. One could not resist his trauma, and becomes a serial killer, walking in the path of revenge. Another one tries his best to overcome the trauma and becomes a police detective. He now faces tragic fate to risk his life to capture the serial killer.
Kim Dong-wook
Hwang Kyung-min
Kim Sung-kyu
Jung Jong-suk
Chae Jung-an
Kang Jina
Choi Hyeon-jin
Kim Chul
Oh Min-suk
Kang-min
Moon Seong-hyun
Kang-min (teen)
Han Soo-yeon
Park Min-ju
Lee Ji-ha
Kyung-min's mother
Jung Eui-jae
Jin Hae-su
Ji Chan
Song Seung-hwan
Sim Hyun-seo
Jung Jong Suk
