Anunprecedented spate of brutal homicides shakes a once-peaceful, close-knit community in 1986 South Korea. As tortured, sexually assaulted bodies keep emerging, the Seoul hotshot detective, Seo Tae-yoon, volunteers to lend a hand, eager to get to the bottom of the knotty case with the help of the baffled local officers, Park Doo-man and Cho