After Haley and her witch friend, Estelle, discover a strange footprint inside their home, they decide to ignore Valians command and enter the postern to learn the identity of the intruder. As the women find their way into a pub inside Roan, they meet up with a cloaked stranger who is wearing the Obsidian stone around his necka tool used by an evil being known for relentlessly torturing fairies. The dark power of the stone is evident everywhere. Now it is up to Haley and her extended family to figure out how to defeat the wicked beast and destroy the stone, before it is too late.
In the continuing saga that surrounds the magical creatures of Bonners Ferry, Haley must keep her wits about hereven as she is confronted by tree trolls, a banshee, and a temptresss spell. But even Haley knows that things are not always as they seem, especially in the land of fairies.
While some fairies want to return to Roan, half decide to remain as citizens who shroud their identities from humans. As the fairies are transported to return home, they manage to escape discovery by the police. After the sorcerer, Maximillion, and Tillys son, Bill, arrive, joy surrounds the royal family. As Haley excitedly prepares for her childs entry into the world, no one predicts the strange phenomenon that occurs on the eve of the babys birtha blue moon in the night sky which, according to legend, marks either a wondrous or foreboding event. After Caroline Belle is born, the king and queen happily settle into family life without any idea that Haley is about to confront her worst fearcoming face-to-face with Molock the Merciless.
Curse of a Blue Moon continues the saga of a group of fairies as evil returns to haunt the royal family and steal everything they hold dear.