S1, E5: Hye In receives a call from the kidnapper, requesting her to go to an old building. Hye In, accompanied by detective Cha, walks into the building and discovers a brutal murder scene. The third mission is to find out who is responsible for the murder. Meanwhile, Dong Min declares to Hye In that he will expose her secret, which he has kept for seven years, to the public by having a press conference.