In 1981, eleven-year-old Agnes Hellaire lives with her troubled parents in the dark Redwood Forest. As her parents' marriage continues to crumble, Agnes is approached by a magical black cat that is more than it seems. It offers to solve all her problems, and she gladly accepts. However, as people close to Agnes begin to disappear; she realises there's something dangerous lurking in the trees. Over twenty years later, Agnes is infamous as...