"A woman's life is turned upside-down when a dangerous man gets a hold of her lost cell phone and uses it to track her every move."
Chun Woo-hee
as Lee Na-mi
Yim Si-wan
as Oh Jun-yeong
Kim Hee-won
as Woo Ji-man
Park Ho-san
as Lee Seung-woo
Kim Ye-won
as Jeong Eun-joo
Jeon Jin-oh
as Kim Jeong-ho
Oh Hyun-kyung
as CEO Oh
Ryu Sung-hyun
as Chief of Detective
Jeon Ik-ryoung
as Jeong-mi
Kim Joo-ryoung
as Eun-mi
Lee Jung-eun
as Chu-yeong
Kim Sun-hoa
as Ja-eun
Kim Min-ju
as Soo-jin
Lee Yong-nyeo
as In-ja
Kil Hae-yeon
as Je-yeon
Choi Chan-ho
as Woo Jun-yeong
Baek Do-kyeom
as KCSI Team Leader
Park So-eul
as Young Lee Na-mi
Park Byeong-hoon
as Detective
Lee Chang-yong
as Cybercrime Detective
Park Joo-young
as Na-mi's friend
Kim Yeon-kyo
Yun Ki-chang
Lee Jung-chul
as Taxi driver
Ryoo Je-seung
as Missing team
Kim Ye-ji
as Police
Lee Geun-hoo
as Victim
Lee Sae-byeol
Kim Geun-young
Kim Tae-joon
Director
Chang Chul-ho
Sound Effects Designer
Heo Yeong-tak
VFX Supervisor
Lee Hye-min
Colorist
Kwon Mi-kyung
Co-Executive Producer
Kim Hyeok
Shin Min-kyung
Editor
Dalpalan
Original Music Composer
Screenplay
Bae Il-hyuck
Lighting Director
Bang Sung-hwan
Key Grip
Seo Jong-hae
Executive Producer
Lee Nae-kyung
Production Design
Park Yong-ki
Sound Supervisor
Ko Dong-hun
Production Sound Mixer
Jin Hoon
Props
Lee Dong-ho
Special Effects Supervisor
Shin Ji-young
Costume Design
Heo Jun-hyuk
Masaki Koide
Associate Producer
Pi Dae-seong
Special Effects Makeup Artist
Kim Hyung-shek
Digital Intermediate
Jeon Jae-hyeong
Martial Arts Choreographer
Lee Byeong-ju
Lee Won-haeng
Producer
Kim Yong-seong
Director of Photography
Park Min-hui
Makeup & Hair
Kim Deok-du
Set Decoration
Kim Chang-seok
Akira Shiga
Novel
Ku Chang-geun
Jeon Young-wook
Still Photographer
Park Jin-hong
Lee Seok-jae
Son Seung-hyun