Unnatural is a case-of-the-week medical mystery show; its main theme is the change of reality brought upon by imminent death of a loved one. Mystery and exhilarating human drama unfold against the backdrop of the “unnatural death institute”, or “UDI”. For example, the body of a young man is brought into the UDI lab one day; cause of his death is attributed to ischemic heart disease. But the victim’s parents are puzzled by the freak nature of their son’s death and turn to medical coroner Mikoto, to find the real reason. Together with her lab technician partner, Yuko Shoji, and rookie medical recorder, Rokuro, they examine the body for a possible drug poisoning and then learn that female colleague of the deceased man has just died suddenly. (Source: TBS)