The private reasoning investigation team "Shadow Clues Archives" was established in an old building behind the scenes of the city. Each member brings with them unsolved mysteries and professional obsessions from the past. As the team takes over a serial disappearance case, they gradually discover the intricate connections between the cases, which involve dark power, technological crime and psychological manipulation, and are even closely related to their own past. Each volume focuses on an independent main case, while simultaneously advancing the hidden stories of team members in parallel. As the mystery is gradually revealed, multiple story lines converge into the ultimate mystery. The team struggles between reason and humanity, justice and redemption, and finally uncovers the huge conspiracy hidden "under the city".
