Sung Jin, a homicide detective with a simple dream, finds himself getting entangled in an insidious scheme of the NSA Director Gyu Nam after delving into an investigation of a suspect named Tae Sung who might be the first serial killer of modern Korean history. Sung Jin accepts Gyu Nam’s dangerous offer under a condition that Gyu Nam helps his son get a leg surgery. In a turbulent era of military oppression,
