Die Lösung der Mordfälle: Es gab eine Person, die in den vollkommen verschlossenen Raum eindringen und daraus entkommen konnte. Saikawa und Moe treffen den Täter im virtuellen Raum. Während sie den Fall aufklären, erfahren sie, wie der Mensch Shiki Magata lebte.
Saikawa reveals that Nishinosono didn't interview Magata originally, but her daughter. Magata's original plan was for her daughter to kill her and Shindō, then take her place. Magata had also planned the computer "malfunction" years in advance. After Nishinosono interviewed the daughter, the daughter began to question the plan and her own identity and killed herself instead. Magata left her suite, pretending to be Miki, her alleged sister who never really existed, during the initial "malfunction", killed Shindō, and left the island along with the members of Saikawa's seminar group.
Le Pr Magata accepte de rencontrer Moe et le Pr Saikawa grâce aux terminaux de réalité virtuelle du centre. S’ensuit une discussion éclaircissant enfin les circonstances du meurtre du professeur…
明かされる事件の真相ーー、四季を殺害したのは部屋にいたもう一人の“四季”だった。ヴァーチャル空間での犯人との対面に臨む犀川と萌絵。二人は事件のトリックを解き明かしながら、その過程で真賀田四季という人間がいかに生きたのかを知る。
