Saku Shingo is a non-career police officer but rose to become a director at an unusually young age. He is one of only 10 directors in the Tokyo Metropolitan Police Department’s First Investigative Division. Directors are the ones that take command of investigation task forces which are set up when major crimes such as murder and kidnapping take place. An investigation task force gathers some 40 – 100 investigators from the Tokyo Metropolitan Police, the police precinct concerned and neighbouring precincts. A director is the leader at an investigation scene who manages this hastily assembled group and is required to come up with a solid investigation plan. Aloof and hard to figure out, Saku is a man who carries out his duties dispassionately. But he has a firm sense of justice and sense of mission