At National Forensic Hospital, an inmate, a woman who is known to have killed her own daughter, has gone missing. However, all the staff members at the hospital claim that they have thoroughly checked the number of inmates and that they have absolutely no idea where and when she has gone missing. Detective Han Tae Gyu is put in charge of investigating the situation and gets into a dispute with Ms. Kang.
9년 전 세상을 떠들썩하게 했던, 딸을 죽인 잔혹한 살해범이 치료감호소에서 탈옥한다.
그리고 도플갱어처럼 흡사하게 생긴 추리소설 작가 마지원이 되어 무지개 마을로 향하는데..
