"A young girl is kidnapped by a serial killer. The serial killer uses manholes to kidnap and kill his victims. The young girl's older sister tries to save her before it's too late."
Jung Yu-mi
as Yeon-seo
Kim Sae-ron
as Soo-jung
Jung Kyung-ho
as Soo-chul
Choi Deok-moon
as Kim Jong-ho
Jo Dal-hwan
as Pil-gyu
Lee Young-yoo
as Kim Song-yi
Yoon Chan-young
as Soo-chul (Young)
Kim Bin-woo
as Female Victim
Yoon Don-sun
as Policeman
Jun Yoon-ji
as Bakery Part-time Worker
Kim Jae-hwa
as Social Worker
Seo Kyung-hwa
as Yeon-seo's Mother
Go Da Yun
as Soo-chul's Older Sister
Shin Dong-ryeok
as Soo-chul's Father
Seo Hyun-woo
as Male Police Officer
Kim Mi-hui
as Female Police Officer
Ha Ji-eun
as Woman in Haengdang Area
Kim A-ram
as Mummy
Yoon Tae-in
as Man of Couple
Song In-seop
as Cellphone Man
Kang Deok-joong
as Rookie Laborer
Shin Jae-Young
Director
Kang Pooung
Martial Arts Choreographer
Kim Jin-yeong
Still Photographer
Do Sang-hyun
Line Producer
Choi Jae-geun
Editor
Kim Bong-jun
Production Supervisor
Kim Jin-a
Makeup & Hair
Kim Hee-jin
Production Design
Kim Yoon-sin
Adaptation
Song Hyun-suk
Lighting Director
Kim Se-hwi
Script Supervisor
Cho Young-chun
Director of Photography