Reiji Mano is a forensic science researcher at the Scientific Research Laboratory in the Tokyo Metropolitan Police Department. He is good at his job, possessing a vast amount of knowledge and having excellent technique. However, he is a lone wolf who does not cooperate with others. When he works on a case, he focuses exclusively on hard facts, ignoring speculation. Reiji Mano hates the media and their thirst for sensational news. When he was a child, Reiji Mano experienced a terrible case. He has looked for the truth in that case ever since. Nonna Sawaguchi is a rookie forensic science researcher who begins to work with Reiji Mano. Because of their work together, Reiji Mano begins to open his mind to others and Nonna Sawaguchi matures as a forensic science researcher.