Shortly after her thirteenth birthday, Hattie receives a cryptic letter from her grandmother asking her to "Come soon." She was always a little strange, sent branches to her granddaughter instead of gifts, wandered through the forest and obviously kept some kind of secret. And now she has completely disappeared. Arriving in the foggy village of Brookewood, Hattie finds that her granny's house is empty, and something is wrong around. While trying to find Granny, Hattie finds herself in an ancient castle and meets members of the Order of the Broken Tree. But who are they protecting the village from?
