Seo Se-Hyun (Park Ju-Hyun) is a genius forensic pathologist. While examining a corpse, she discovers traces of her father Yoon Jo-Kyun (Park Yong-Woo) who is a serial killer. She desperately attempts to track down her father Yoon Jo-Kyun with Jung Jung-Hyun (Kang Hoon). He is the chief of the violent crimes team.