A magnificent English detective story set in the eerie and mysterious atmosphere of a boarding school. The tale of twin sisters who must uncover the secrets and riddles of their school—and stand up against the demonic headmistress, Miss Fox. After Scarlet Ivy’s death, the girls are brought to Rookwood School and forced to pretend they are her sister. Ivy realizes that very strange things are happening at school, and the students are so terrified they don’t dare say a word. After finding pages from Scarlet’s diary, Ivy begins her own investigation. But the girl’s life is in danger, because Miss Fox never sleeps…