Unnatural Episode 1

The body of a young man is brought into the UDI lab one day; his cause of death attributed to ischemic heart disease in which blood fails to be conveyed to the heart. But the victim’s parents are puzzled by the freak nature of their son’s death and turn to medical coroner Mikoto, to find out why. 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 another female colleague of the deceased man has just died suddenly. (Source: IMDb)