Kyung-chul is a dangerous psychopath who kills for pleasure. Soo-hyeon, a top-secret agent, decides to track down the murderer himself. He promises himself that he will do everything in his power to take vengeance against the killer, even if it means that he must become a monster himself.
Lee Byung-hun
Choi Min-sik
Jeon Kuk-hwan
Cheon Ho-jin
Oh San-ha
Kim Yoon-seo
Nam Bo-ra
Lee Jun-hyuk
Yoon Chae-yeong
Choi Moo-seong
Kim In-seo
Kim Kap-soo
Um Tae-goo
Choi Jin-ho
Mi-nam Jeong
Jo Deok-jae
Jang Jeong-won
Park Seo-yeon
Lee Seol-gu
Kim Yeong-chan
Goo Yong-wan
Kim Dae-hye
Kim Jae-geon
Park Ji-yeon
Son Young-soon
Nam Hyeon-joo
Han Chul-woo
Sin Jeong-hoon
Han Se-joo
Park Jeong-gi
Jo Myeong-yeon
Kim Bong-soo
Kim Kang-il
Sin Sin-Beom
Seol Chang-hee
Yoon Byung-hee
Jung Tae-sung
Jang In-seo