

"The worst of them will stay with you... forever."
During the late 1980s, two detectives in rural South Korea attempt to solve a series of gruesome rape-and-murders of young women that leave the community terrified using limited resources and outdated methods. But when the murderer strikes several more times with the same pattern, the detectives realize that they are chasing the country's first documented serial killer. They then attempt to piece together the clues in this thriller based on true events.
Detective Park Doo-man

Detective Seo Tae-yoon

Detective Cho Yong-koo

Sergeant Shin Dong-chul

Sergeant Koo Hee-bong

Officer Kwon Kwi-ok

Jo Byung-soon

Baek Kwang-ho

Park Hyeon-gyu

Kwok Seol-yung

Woman from Hill

Kim So-hyun

Kwang-ho's Father

Journalist

Autopsy

Little Girl

Little Boy

Doctor Noh

School Nurse

Shaman

Investigator at So-hyun's Crime Scene

Investigator at So-hyun's Crime Scene

Pharmacist

Cop Dressed as Woman

Nurse

So-hyun's Mother

Broadcast Station AD

Suspect

Cop (uncredited)

Fellow Detective

Fellow Detective

Fellow Detective

Fellow Detective

Rapist

Lee Hyang-suk
Student

Photojournalist

Boiler Kim
Cement factory worker
Park Hyeon-gyu's Landlord

Official