For as long as she can remember, thirteen-year-old Mag has lived with her father at a home for the mentally ill.The patients are all clearly mad, so when the usually silent Grace claims that she's Mag's real mother - and also a witch - Mag's world is turned upside down.As things take a turn for the weird, and Mag sees things that others can't, it may just be that she is a witch after all.In this new world, Mag discovers that the difference between good and evil isn't exactly black and white