Roh Hanna is a new assistant professor of Forensic and Pathology Department in Yulje Medical Center. She just moved to Seoul from Australia a month ago with her daughter and started working in Yulje Medical Center under the supervision of Dr. Kwon Jung Hoon, a renown forensic examiner in Korea. Everything was fine until one day she came across her old friend, Yang Seokhyeong and Ahn Jongwon, at Yulje's cafeteria. It has been almost thirty years since her eyes set upon them and yet the memories were fresh in her mind. A story of unfinished business that span almost thirty years.