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A vigilante known as "Dr. Q" gruesomely executes criminals who escape justice, uploading videos of his killings online. Young cop Bong and his seasoned partner Na investigate while clashing with S.T.F. counterparts Lt. Pyo and tech expert Kang.
19 Cast Members
Im Won-hee
Bong Soo-chul
Shin Eun-kyung
Kang Min-ju
Kim Min-jong
Lieutenant Pyo
Joo Hyun
Team Leader Kim
Jang Hang-seon
Detective Heo
Kim Kap-soo
Park Shi-jong
Lee Byung-wook
Joo Sang-hoon
Yoon Seung-won
Detective Na
Yun Ju-sang
Deputy Chief Go
Kim Young-woong
Ma Goo-ri
Kwon Tae-won
Detective Lee
Hyun Sook-hee
Team Leader Kim's Wife
Heo Seon-haeng
Lawyer Song
Oh Seong-tae
Special Investigation Bureau
Sung Ki-yoon
Butcher Group
Kim Gyeong-ryong
Homeless
Kim Koo-taek
Function Colleague
Lee Yong-jik
Caps Scraper
Park Kyeong-hwan
