Mako, Miko, and Mutsuko, three young girls, decide to visit St. Claire Elementary, a school known for its bizarre myths. During the visit, the girls stumble upon Kunstrijk, a model of the human anatomy, and Goth, a skeleton, both of which haunt the science room scheduled for demolition. Kunstrijk and Goth are furious with the girls for vandalizing them, and as an act of revenge, Kunstrijk invites them to a midnight party at the school, intending to scare them. The five of them join forces to get three ancient medals that hold the power to grant wishes, hoping to save the science room.