Because of the sudden death of her mother, Satsuki Miyanoshita moves into her parents' hometown with her father and younger brother, Keiichiro. Satsuki and Keiichiro transfer to Amanokawa Elementary School where their parents used to study together. On the first day, they go into an abandoned building located in the back of their school, without knowing that the building is known as a haunted hall among the locals. There, they find a diary that used to belong to their deceased mother.
According to the diary, the ghosts have been sealed up inside of the great tree in the woods behind the school. But the woods are now being cut down for estate development, and as a result the ghosts have been set free. Satsuki, Keiichiro and their friends set out to seal up the ghosts one more time...