Abandon all compassion.
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.
Kim Soo-hyeon
Kyung-chul
Squad Chief Jang
Section Chief Oh
Joo-yeon
Se-yeon
Section Chief's Daughter
NIS Agent
Nurse Han Song-i
Tae-joo
Se-jung
Planning Team Deputy Head