Life can be cruel for a servant girl in 1850s London. Fifteen-year-old Abi is a scullery maid in Greave Hall, an elegant but troubled household. The widowed master of the house is slowly slipping into madness, and the tyrannical housekeeper, Mrs. Cotton, punishes Abi without mercy. But there's something else going on in Greave Hall, too. An otherworldly presence is making itself known, and a deadly secret will reveal itself—a secret that will shatter everything Abi knows.