Conan, Ran, and Kogoro knocked on a mansion door at night as they were lost. The door is open and a man in a hood is seen which makes them scream. They see behind the mysterious man more people dressed like him. One of them notices Kogoro and shows himself as Kouji Yatsukawa. They are allowed to come in and everyone tells Kogoro who they are. Hiraski tells them that they will be holding a séance for their idol, (who was supposed to be a star in the Black Magic Girl Movie). They decided to hold a séance as rumors have come up saying if people ditched the club, they will be suffered with illness. They also brought up a murder who was supposed to be related to the death of Kira.

Conan investigates both sealed rooms, looking for the culprits trick. Conan deduces there may be more than one murderer between the past and present victims.