The Mori Detective Agency receives a phone call from client Nagamine Mayako. Mayako has an appointment at the agency office, but she seems to have gotten lost. Though it's past her scheduled appointment time, Kogoro, who knows from her social media photos that Mayako is beautiful, seems excited. The client noticed her husband has been acting suspiciously and would like him to investigate the possibility that he is involved in criminal activity. Kogoro continues waiting for a while, but Mayako never shows up, and the agency receives another phone call...