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...