Matsumoto Mao is supposed to become the new medical examiner and visit the USA at the age of 10. While there, she is to study advanced placement 3rd year Forensics. She has an IQ of over 150. Suddenly, she becomes like an ordinary person, confusing everybody except Kyoko. A rush of bodies come in for autopsy. A middle-aged man who apparently fell for a scaffolding at a construction site comes in. Mao begins the autopsy without a speck of the days' exhaustion showing. She discovered that he did not simply hit his head while falling. (Source: wiki.d-addicts)