A Japanese police officer named Kyo Kugayama and Kyo Hoshina, a 12-year old genius with an IQ of 250, embark on a quest to investigate a person known as the Professor. Nothing is known about him, except he is said to be a genius like Hoshina and said to be linked to multiple bombing attacks in Japan when Hoshina was recalled from the US to assist the National Police Agency in their investigation of the bombing cases.