Moving to a new town is tough on kids. Nothing is familiar, and with no friends, it can be scary. In Satsuki's case, that last part isn't helped any when she, her little brother, and three kids from school end up in the old schoolhouse, which just so happens to be haunted by ghosts!

While in the old schoolhouse, Satsuki hears a haunting melody drifting through the halls. The only trouble is the lack of a pianist! It seems that if Satsuki hears the melody a total of four times, she'll die. The gang saddles up to put the ghostly piano to sleep.

A strange nurse haunts Keiichiro, which triggers memories of the past. Not just for Satsuki and Keiichiro, who remember the death of their mother, but for Momoko as well, who happened to meet their mother just before she passed away. Is the cursed nurse here to take the siblings to join their mother?

The entire school is possessed and drawn into the old schoolhouse, all to lure Satsuki and the gang into a trap. Lord Ohma has awoken, and seeks vengence upon Satsuki for her family's past attempts to seal him. In this final confrontation, who will emerge?