It's been five years since Princess Cassia last saw her parents. Her kingdom and its people have been plagued by a mysterious sickness and are threatened by an encroaching Darkness. No one knew that the magical crystals used to heal and protect also contained the Darkness. As the royal family and their Protectors struggle to keep their people safe, they receive help from an unexpected ally. For years the Huldra have been feared, but now the King must put aside his hesitation for the sake of his people. The Huldra comes to their aid, but no one knows who ignited the Darkness in the crystals. As human and Huldra work together to find a cure for the sickness, another threat looms beyond the boundaries of the kingdom.