As the Spook's apprentice, Tom Ward must protect the County from the creatures of the dark. But now his mother has returned from her homeland to seek his help. A dangerous ancient witch, Ordeen, is about to rise, bringing with her suffering and devastation. Tom's mother has mustered a powerful army—including Tom's friend Alice and the assassin Grimalkin—to confront Ordeen. If Tom joins them, the Spook will abandon Tom as his apprentice. What sacrifices will be made in the battle against the dark?