The police procedural tackles crimes and clues in the cyber world, weaving a massive, twist-filled mystery of murders, identity switches, corruption and conspiracy.
So Ji-sub
Kim Woo-hyun / Park Gi-young
Lee Yeon-hee
Yoo Kang-mi
Uhm Ki-joon
Jo Hyun-min
Kwak Do-won
Kwon Hyuk-joo
Song Ha-yoon
Choi Seung-yeon
Choi Daniel
Park Ki-young
Kwon Hae-hyo
Han Young-seok
Choi Jung-woo
Shin Kyung-soo
Jang Hyun-sung
Jeon Jae-wook
Jeong Dong-hwan
Kim Seok-joon
Lee Ki-young
Im Chi-hyun
Esom
Shin Hyo-jung
Lee Won-keun
Kwon Do-young
Jang Hang-jun
Cameo
Im Ji-gyu
Byeon Sang-woo
Jin Kyung
Oh Yeon-suk
Dong Bang-woo
Cho Gyeong-sin
Lee Jae-yoon
Cho Jae-min
Park Ji-il
Executive Moon
Kim Seung-o
Shin Hyo-jung's fan
