Spade spends his nights digging graves, where no one notices his limp or calls him names. His father comes up with a plan to rob a grave in the Wyndhail castle cemetery, which lands Spade and his brother caught in a royal trap. Now he is tasked with locating a deadly creature that's stalking the castle at night. He meets Ember, the queen's niece, and they both race to solve the mystery of the legendary Deepstones and their connection to the Woegon.