On June 25th, 1983, the entirety of Hinamizawa’s residents was wiped out in a gas disaster of volcanic gas. However before that a girl, Furude Rika was killed by disembowelment and . The area of Hinamizawa was sealed off for over 20 years; it’s now open to the public. Many suspicious events occurred during the investigation such as filling Onifaguchi Swamp with concrete which would've done nothing to stop the gas.

It’s been rumored that the government was covering up a bioterrorism attack. Rika Furude strangely enough, predicted her death. How? No one knows… All people know is that she told the police that she would die on that exact day.

File No. 34 is a document which showed up on the internet. It says a UFO crash landed into Onifaguchi Swamp and spread out parasites that controlled the villagers to commit violent acts. Who was writer of this notebook? No one knows, however it’s widely believed to be Takano Miyo, a local nurse of the Irie clinic in Hinamizawa, who was also known to many as an occult maniac. Now people come and go to visit Hinamizawa however a group of people are now in Hinamizawa and are about to start their journey into a world they wished they never stepped foot on.

Will they get tangled into Hinamizawa’s web of lies? Will they find out what happened in Hinamizawa 20 or so years ago? What's File 34? Is it real!? Just what happened on the day of June 25th, 1983!?