The story takes place in the modern metropolis S city. With a highly professional reasoning team of six as the core, team members each have unique skills and complex backgrounds, and collaborate through multiple cases. Each volume revolves around a main case and several branch cases, including the team's internal growth, friendship, and conflicts, as well as questioning of social reality. The overall rhythm is tight, and each volume is not only an independent chapter, but also progresses in the main line and character growth, ultimately revealing the huge conspiracy and loss of humanity hidden behind the case.