Grace has never been good at anything except magic -- not that anyone believes her. While other children are adopted from the orphanage, nobody wants Grace. So she decides to make a home for herself by running away and offering herself as an apprentice to the witch in the nearby woods. After all, who better to teach Grace to use her magic? Surely the witch can't be that bad. But the witch is that bad -- she steals souls for spells and gobbles up hearts. So Grace offers a deal: If she can learn all 100 spells in the witch grimoire, the witch will make Grace her apprentice. But if Grace fails, the witch can take her magic. The witch agrees, and soon an unexpected bond develops between them. But the spells are much harder than Grace expected, and when a monster from the witch's past threatens the home Grace has built, she may have to sacrifice more than her magic to save it.