About the book: 2020 / A secluded island where a mysterious mass murder took place six months ago. A small piece of land with elaborate buildings - the creations of the strange owner of these places, Seiji Nakamura, who, among others, died in that brutal massacre. Rumor has it that his ghost still wanders there in the dark... Is there a more suitable place in the world for members of the student detective club who adore such mysteries? The mystery they are about to face is not one of the armchair puzzles they are used to: unknowingly, amateur detectives took something dear from the late Nakamura, and now someone is seeking revenge... In accordance with the canons of the honkaku genre we know from the beginning that these characters are destined to die. And as the action progresses, we learn everything that will help us compete on equal terms in the desperate search for the killer with his future victims. And with an incredible detective whose name is Kiyoshi Shimada…