Chun Woo-hee Lee Na-mi Yim Si-wan Oh Jun-yeong Kim Hie-won Woo Ji-man Park Ho-san Lee Seung-woo Kim Ye-won Jeong Eun-joo Jeon Jin-oh Kim Jeong-ho Oh Hyun-kyung CEO Oh Ryu Sung-hyun Chief of Detective Jeon Ik-ryoung Jeong-mi Kim Joo-ryoung Eun-mi Lee Jung-eun Chu-yeong Kim Sun-hoa Ja-eun Kim Min-ju Soo-jin Lee Yong-nyeo In-ja Kil Hae-yeon Je-yeon Choi Chan-ho Woo Jun-yeong Baek Do-kyeom KCSI Team Leader Park So-eul Young Lee Na-mi Lee Chang-yong Cybercrime Detective Park Joo-young Na-mi's friend Kim Yeon-kyo Na-mi's friend Yun Ki-chang Detective Lee Jung-chul Taxi driver Ryoo Je-seung Missing team Lee Geun-hoo Victim Lee Sae-byeol Victim Kim Geun-young Victim Chun Woo-hee Lee Na-mi Yim Si-wan Oh Jun-yeong Kim Hie-won Woo Ji-man Park Ho-san Lee Seung-woo Kim Ye-won Jeong Eun-joo Jeon Jin-oh Kim Jeong-ho Oh Hyun-kyung CEO Oh Ryu Sung-hyun Chief of Detective Jeon Ik-ryoung Jeong-mi Kim Joo-ryoung Eun-mi Lee Jung-eun Chu-yeong Kim Sun-hoa Ja-eun Kim Min-ju Soo-jin Lee Yong-nyeo In-ja Kil Hae-yeon Je-yeon Choi Chan-ho Woo Jun-yeong Baek Do-kyeom KCSI Team Leader Park So-eul Young Lee Na-mi Lee Chang-yong Cybercrime Detective Park Joo-young Na-mi's friend Kim Yeon-kyo Na-mi's friend Yun Ki-chang Detective Lee Jung-chul Taxi driver Ryoo Je-seung Missing team Lee Geun-hoo Victim Lee Sae-byeol Victim Kim Geun-young Victim