Episodes

Moe Nishinosono interviews Shiki Magata, who secludes herself in the lab established by her parents on Himaka island, via video conference. At Sōhei Saikawa's office, Nishinosono meets Setsuko Gidō, whose familiarity with Saikawa annoys Nishinosono. Nishinosono later tells Saikawa, Momoko Kunieda, and Fukashi Hamanaka about the interview with Magata. Afterward, intending to meet Magata again, she suggests the campground on Himakajima island for Saikawa's upcoming seminar group trip. || A genius doctor has stayed inside a sealed room in a lab for 15 years following her arrest for the murder of her parents. Now architecture professor Souhei Saikawa, and his student, Moe Nishinosono go to her isolated island to visit her. Source: crunchyroll

En route to the island, Yukihiro Yamane tells Saikawa and Nishinosono that Magata has not interacted with other people except via video conference for the 15 years since she murdered her parents. When they visit the lab, the AI named Deborah that runs the lab's physical facilities malfunctions, and an automated cart transports a wedding-dress-clad object on a cart out of the suite, which is discovered to be Magata's corpse. In a flashback to when Magata was 13 years old, she begins a sexual affair with Seiji Shindō, her uncle and director of the lab. || The camping trip to Himeka island gets off to a great start with a BBQ and lots of alcohol. But when Moe visits Dr. Magata`s lab, things take a sinister turn. Source: crunchyroll

Tomihiko Yuminaga declares Magata's death a murder, since her arms and legs have been amputated. With outside communication mysteriously cut off, the lab personnel wait for Shindō, who left to retrieve Magata's sister Miki, to return in order to use the radio in his helicopter to contact the police. Meanwhile, Saikawa and Nishinosono review the video surveillance footage of the outside of Magata's room and verify that no one else emerged from her suite. Shindō returns with Miki, but he is later discovered murdered in his helicopter. || Nobody can believe their eyes at the corpse that appeared from within Shiki`s room. They try to figure out what happened, but the room was completely closed off, which only makes the plot thicken. Source: crunchyroll

The helicopter's radio has been smashed, apparently before Shindō could use it. Computer records show that no one accessed the roof between the time when Shindō and Miki arrived and when Shindō was found dead. Saikawa, Nishinosono, Yamane, and the lab security guards enter Magata's suite and discover a small robot in the bedroom. The robot's only physical capability, other than basic mobility, is to lock and to unlock the bedroom door. The robot's name is Michiru, the same as Magata's favorite doll. || After the first murder, Shiki`s uncle, Director Shindou, is killed as well. The lab is in an uproar. To find out who the killer is, Nishinosono and Saikawa investigate Shiki`s room. There they find a robot named Michiru, and a strange message saying "Everything becomes F." Source: crunchyroll

In a flashback, Shindō tells Magata that his dream is to live a self-sufficient life in the mountains, equipped with only a knife. His widow Yumiko Shindō recalls for Saikawa and Nishinosono that the last words of Magata's father were "I won't let you do this." Yamane learns that Magata had scheduled an interview with a journalist for two days hence, so the lab will have another opportunity for outside communication. In another flashback, Magata buys a hunting knife and presents it to Shindō for his birthday as they have dinner with her parents. || In the process of investigating Director Shindou`s murder, Nishinosono and Saikawa learn the details of Shiki`s multiple personalities and the murder of her parents that took place 15 years ago. The two of them try to figure out what she was thinking in order to find a clue. In doing so, Nishinosono is forced to confront her own past. Source: crunchyroll

Saikawa and Nishinosono return to the campground the next morning and tell the group about the murders. In the evening, they return to the lab. Nishinosono notices upon reviewing the surveillance video again that, when the cart emerged from Magata's suite, the elevator went from the basement to the roof. In a continuation of the dinner flashback, Magata uses the knife to kill her mother, and Shindō and Magata kill Magata's father as Yumiko arrives. || Saikawa and Nishinosono return to the camp, putting off trying to find a solution to the case. But they can`t stop thinking about it. They go back to the lab and investigate Dr. Shiki`s rooms again, where they find a strange number that is a clue. Source: crunchyroll

Ayako Shimada takes Nishinosono to the lab's entertainment center, where they spend time in isolation tanks. Meanwhile, Saikawa interviews Miki, but she has no idea why anyone would kill Magata or Shindō. During Nishinosono's isolation-induced hallucinations, she has a conversation with Magata about the plane crash that killed her parents. In a continuation of the dinner flashback, Magata tells Shindō that the story they'll tell is that Magata killed both her parents and that Shindō tried to stop her. || 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. Source: crunchyroll

Shimada checks the computer records and notices that someone named Michiru accessed the isolation tank system while she and Nishonosono were in the tanks. Shimada and Saikawa think someone may have pieced together audio clips to impersonate Magata. Yamane switches the lab's computer systems from Red Magic, the lab's proprietary operating system, to UNIX in an attempt to end the computer malfunctions. External communication is restored, and Nishinosono calls her butler, telling him to call the police. || 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. Source: crunchyroll

The boat arrives the next morning, bringing the journalist, Setsuko Gidō, and allowing the seminar group to leave. The prefectural police also arrive. Saikawa and Nishonosono deduce that Magata entered her suite 15 years ago pregnant and had a daughter there. They also realize that the computer malfunction reset the lab's clocks by one minute, allowing the killer to move without video surveillance for that minute. Saikawa uses the computer to make voice contact with "Michiru" and addresses her as Shiki Magata. || 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. Source: crunchyroll

Magata visits Saikawa at the university. She says that she won't turn herself in, because she might not be sentenced to death. She also won't commit suicide, because she wants someone else to kill her. As she leaves, she is surrounded by what appear to be the police guard following Saikawa, but Nishinosono later informs Saikawa that the guard had been called off earlier. Saikawa reveals to Nishinosono that Gidō is his little sister. In a flashback, Magata and her daughter discuss the nature of humans and relationships. In the final scene, Magata introduces her new personalities, her daughter Michiru and her uncle Shindō to Kishio, the personality based on her dead twin brother. || Time has passed since the incident at Magata Labs, and Saikawa and Nishinosono`s daily life is returning. Then one day, Shiki visits Saikawa at the university library.. Source: crunchyroll