- New medical examiner Matsumoto Mao (Takei Mao) has joined the Chuo Medical Examiner's office. A beautiful, talented doctor without any relatives, she is proud of her IQ which exceed 150. She went to America at the age of 10, skipped three grades and studied forensic medicine.
An oldball whose only interests are the autopsies and dissections of dead bodies, she also has no friends. As she faces numerous dead bodies each day, she is challenged to find out the cause of death of the mother who abandoned her...