There's been an accident! Something's wrong! She doesn't know who she is， and doesn't know why she's invisibly floating through the buildings and grounds of a half-remembered boarding school. Then， to her horror， she encounters the ancient evil that four peculiar sisters have unwittingly woken -- and learns she is their only hope against a deadly danger.，A ghost， uncertain of her identity， watches the four Melford sisters hatch a plan to get their parents' attention and slowly becomes aware of the danger from a supernatural power unleashed by the the girls and their friends from the boys boarding school run by the Melfords.A ghost， uncertain of her identity， watches the four Melford sisters hatch a plan to get their parents' attention and slowly becomes aware of the danger from a supernatural power.