Saikawa meets Miki, Dr. Magata's sister, and realizes that Dr. Magata's unique mind has remained unchanged since childhood. Meanwhile, Moe experiences virtual reality with the help of another member of the institute's staff, Shimada. As she does, a mysterious voice forces her to confront her own past.

After her experience in Virtual Reality, Nishinosono remembers that Saikawa was with her after her parents death. The lab attempts to reset the non-functioning Red Magic system, and as the lights go out Saikawa finds a clue.

The lab maintenance is finished and the system comes back online. The police come to the island, but the investigation has made no progress. At last, however, Saikawa solves the mystery of the locked room and prepares to confront the culprit.