Iwakura Real Estate, a company that investigates properties marked as "accident properties" with "notices" on the wall, receives a new request. This time, the request is about Room 201 in Urban Heights, where tenants have been moving out one after another due to strange noises being heard. Investigators Mayama Yuto and Shinonome An begin their investigation, but a strange phenomenon is looming over them as well. As they continue their investigation, they discover that the cause of the strange happenings in Room 201 is Room 301 on the floor above. However, when they step into the "unopened Room 301," a frightening truth is revealed...