Satsuki, the new kid in town is getting ready for her first day at school. She just moved in with her father and little brother. When Satsuki and Keiichirou (her brother) are walking up the front steps of the school house, their cat escapes, running away from them into the old school house that is supposedly cursed. Satsuki and Keiichirou run into a couple other kids from the school, Leo (or Reo), Momoko, and Hajime. The kids must work together to defeat the evil ghost Amonojaku using notes from Satsukis mother. After defeating the demon, it's soul gets transferred into the cat. The cat only causes problems for Satsuki, and in order to free him, she needs to seal away every demon in the old school house.