

"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

Detective

Planning Director

Gangster in Taxi
Detective Kang

Kyung-chul's Son
Woman at Pension

Gangster in Taxi

Young Pharmacist
Corporal
Hospital Worker
Old Doctor

Teacher

Kyung-chul's Mother

Section Chief Oh's Wife
Detective Park

Policeman at Stream
Woman on Bus
Sergeant

Detective
Kyung-chul's Father

Park Han-gi

Old Pharmacist
Detective

Jang-goo

Hotel Agent
Student