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.
as Kim Soo-hyeon
as Kyung-chul
as Squad Chief Jang
as Section Chief Oh
as Joo-yeon
as Se-yeon
as Section Chief's Daughter
as NIS Agent
as Nurse Han Song-i
as Tae-joo
as Se-jung
as Planning Team Deputy Head
as Detective
as Planning Director
as Gangster in Taxi
as Detective Kang
as Kyung-chul's Son
as Woman at Pension
as Gangster in Taxi
as Young Pharmacist
as Corporal
as Hospital Worker
as Old Doctor
as Teacher
as Kyung-chul's Mother
as Section Chief Oh's Wife
as Detective Park
as Policeman at Stream
as Woman on Bus
as Sergeant
as Detective
as Kyung-chul's Father
as Park Han-gi
as Old Pharmacist
as Detective
as Jang-goo
as Hotel Agent
as Student
