The high school built on the gateway receiving signs from the spirit world; Spirits get stronger with the dark moon.
To see if the ghost stories of the school are true, to get the stuff back they left at school... High school students go to school in the middle of the night for their own reasons and start to panic when they see ghosts. They are not able to find friends who went there together, and also unable to leave school. The students try to disclose the truth of the ghost story with few clues...
