Major crimes unit detective Seong-jin arrests Tae-sung for petty crimes, but shocked to find out that he is the notorious serial killer. However, Seong-jin becomes doubtful of his identity as the serial murder case is investigated.
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Son Hyun-joo as Kang Seong-jin
Jang Hyuk as Choi Gyu-nam
Ra Mi-ran as Song Jeong-sook
Jo Dal-hwan as Kim Tae-sung
Ji Seung-hyun as Park Dong-gyu
Oh Yeon-ah as Park Sun-hee
Park Ji-il as General manager Lee
Choi Youn-so as Ji-sook
Jong Ho as Reporter
Kim Sang-ho as Jae Jin
Park Kyung-geun as Group leader Yang
Ju Seok-tae as Young prosecutor
Jang Yong-chul as General Manager Ma
Jang Yong-bok as Mr. No
Kim Song-il as Detective Kim
Jeong Man-sik as Sin Yong-soo
Son Byung-ho as
Jang Gwang as Assemblyman Kim
Choi Seong-min as Kim Dae-sik
Lim Ji-Min as Gisaeng at Korean restaurant
Jeong Han-bin as NSP agent
Hwang Moo-young as
Heo Seon-haeng as Director Kang
Kim Geon as Agent Kim
Lee Yu-jin as Choi Mi-ja
Lee Hak-Ryul as Lee Yo-won
Song Yo-sep as Torture expert
Lee Jung-chul as Press bureau director
Park Jae-cheol as Pug dog's gang
Nam Jeong-woo as Newspaper reporter
Lim Yong-soon as Lawmaker Jung
Lee Seung-yong as Free Daily reporter
Yeo Moo-yeong as Professor Park
Kim Jung-soo as Police chief
Matthew Douma as Michael
Park Hyeong-su as Agent
Kim Si-young as Reporter
Oh Jin-ha as Nurse
Shin Seung-hwan as Free Daily Reporter
Noh Shi-hong as Torture tech
Lee Ja-eun as Cafe woman
Kang Dong-woo as Detective Kang
Lee Won Hee as Prison officer
Heo Na-kyung as Gisaeng
Kim Young as Student
Shin Jeong-man as Montage man
Jang Young as Doctor
Kim Moon-jong as Agency for National Security Planning Agent Kim