Yoshinaga Seiichi is a detective of the Kanagawa Prefectural Police’s First Investigative Division. He believes “there is no case that cannot be solved”, and he never gives up on an investigation. His partner is Kagami Kiichi, whose father, Takashi, was the prefectural police’s legendary detective. Kujo Kazumai, a police official who graduated from Tokyo University, is sent to the First Investigative Division. He should have taken the post of Director, but an exception has been made in accordance to his wishes and he is assigned to be a detective out in the field.
