Plot Analysis Summary
A reporter and two connected investigators pursue disappearances linked to a mountain, an impossible facility, and a disturbing videotape.
Story Structure — 5 Plot Phases
A Rescue Reopens The Past
A missing boy is found near a river, reminding Mikoto of an older disappearance. She visits Keita and begins examining his connection to both cases.
Key Events
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Missing Boy Found — A missing boy is found near a river several kilometers from where he disappeared. Characters: Mikoto Kusumi
Location: River near the forest road
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An Old Disappearance Resurfaces — The rescue reminds Mikoto of Keita's younger brother, who vanished thirteen years earlier. Characters: Mikoto Kusumi, Keita Kodama
Location: River rescue aftermath
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Mikoto Visits Keita — Mikoto visits Keita and begins connecting him to the recent disappearance. Characters: Mikoto Kusumi, Keita Kodama, Tsukasa Amano
Location: Keita's home
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Roommate Interview — Mikoto speaks with Tsukasa about Keita and the investigation. Characters: Mikoto Kusumi, Tsukasa Amano
Location: Keita's home
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Keita Withdraws — Keita remains distant and troubled while carrying a personal alarm everywhere. Characters: Keita Kodama
Location: Keita's home
The Tape From Childhood
Keita receives old belongings from his mother, including a videotape. The tape appears to contain clues about his vanished younger brother.
Key Events
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Old Belongings Arrive — Keita's mother sends old belongings, including a videotape he does not want to watch. Characters: Keita Kodama
Location: Keita's home
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The Tape Offers Clues — The videotape appears to document a childhood journey and may reveal the brother's fate. Characters: Keita Kodama, Mikoto Kusumi
Location: Keita's home
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Mountain Investigation Begins — Keita and Tsukasa explore the mountain linked to the old disappearance. Characters: Keita Kodama, Tsukasa Amano
Location: Mountain area
Evidence On The Mountain
Keita and Tsukasa explore the mountain and find an illegally dumped urn. The area's history as a place for unwanted objects strengthens Keita's suspicions.
Key Events
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Illegally Dumped Urn — They discover an illegally dumped urn in the mountain area. Characters: Keita Kodama, Tsukasa Amano
Location: Mountain area
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Mountain As Abandoned Place — They learn the location has long been treated as a place for unwanted objects. Characters: Keita Kodama, Tsukasa Amano
Location: Mountain area
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Mikoto Compares Records — Mikoto compares the videotape with records concerning the disappearance. Characters: Mikoto Kusumi
Location: Investigation records
The Ruins That Never Existed
Mikoto compares the videotape with disappearance records and finds the same ruins in both recordings. Historical records deny that such a facility ever existed.
Key Events
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Ruins Appear In Both Tapes — The recording shows ruins also appearing in the video tied to the brother's case. Characters: Mikoto Kusumi, Keita Kodama
Location: Videotape footage
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The Impossible Facility — Records show that no facility matching the ruins ever existed there. Characters: Mikoto Kusumi, Keita Kodama
Location: Historical records
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A Place Outside Reality — The evidence suggests both groups reached a place unavailable in the ordinary world. Characters: Mikoto Kusumi, Keita Kodama, Tsukasa Amano
Location: Mountain and videotape footage
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The Mountain Follows Keita — Keita behaves as though something from the mountain has followed him home. Characters: Keita Kodama, Tsukasa Amano
Location: Keita's home
A Dangerous Return
Tsukasa believes the mountain has affected Keita for years, while Keita's mother is found dead. Ignoring warnings, Keita leaves for the mountain as Mikoto and the others follow.
Key Events
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Tsukasa Sees The Dead — Tsukasa admits he can see the dead and fears Keita has been affected for years. Characters: Tsukasa Amano, Keita Kodama
Location: Keita's home
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Death In The Family Home — Keita's mother is found dead upstairs, apparently by suicide. Characters: Keita Kodama
Location: Second floor of the family home
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Perception Becomes Uncertain — Keita may have seen the body, while Tsukasa suspects the mountain altered his perception. Characters: Keita Kodama, Tsukasa Amano
Location: Family home
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Keita Chooses The Mountain — Despite warnings, Keita decides to return immediately and seek the mysterious place. Characters: Keita Kodama, Tsukasa Amano
Location: Keita's home
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Keita Leaves For The Mountain — Keita leaves before Tsukasa can stop him as Mikoto and the others try to follow. Characters: Keita Kodama, Tsukasa Amano, Mikoto Kusumi
Location: Route to the mountain