- The face of the male corpse that was discovered has been destroyed, his fingers burnt. The cause of death: strangulation. His identity is determined to be Togashi Shinji (unemployed). Detective Utsumi Kaoru from Kaizuka Precinct sets out to investigate the case. On the day Kaoru goes to confirm the alibi of Hanaoka Yasuko, Togashi’s estranged wife, she learns that Yasuko’s neighbour is also a graduate from Teito University just like Yukawa. The neibour’s name is Ishigami Tetsuya. He is a high school mathematics teacher. As far as physicist, Yukawa Manabu, is concerned, Ishigami is a real genius. Asked for advice on the case by Kaoru, Yukawa deduces that a genius mind, and therefore the only “friend” whom he has ever had a mutual understood with, is behind it. A genius mathematician who has woven lies, loopholes, psychological warfare, bluffs and a variety of tricks has set up a complicated puzzle to challenge “Tantei Galileo”.