- 1 Season
A woman, Cha Soo-kyung, works for the Seoul Police Department and becomes the head detective of the H.I.T, "Homicide Investigation Team." Soo-kyung, the leader of the team, is in charge of apprehending a murderer that has killed multiple people. Soo-kyung had lost her fiance to a murderer whose killing methods are almost identical to the murderer she is trying to capture. The new D.A., Kim Jae-yoon, assigned to the case, ends up in conflict with Soo-kyung.