Akechi is relaxing at a spa to relieve the exhaustion of his recent cases. Nakamura asks him about his history with Twenty Faces, and Akechi begins to recount the trauma of his youth.

Isuzu is negotiating with the police for three billion yen in exchange for the removal of the residents of the housing complex. Nakamura requests the aid of Akechi and the Boy Detectives' Club in the case.