When the moon rises, Princess Belle Du Bois is no longer a princess. At night, she steals away to her workshop hidden in the castle’s dudgeon. She is a mechanic − A ticking pocket watch at her hip, the warmth of a lamp glowing between her fingers, the hiss of hot metal in water. These are her true loves. Her talents are a secret to everyone, except perhaps the legendary Beast that is said to stalk the dungeons below the West Wing. Belle’s brother, the soon-to-be king, is kidnapped, and the only way to save him is to invent a mechanism even more powerful than magic. With the help of the enigmatic Captain Adam Girouard and a team of Delusionists, addicts of a tiny, scarlet flower— a drug called Delusion — who stalk the catacombs that run like veins beneath the city, Belle leads a team to bring her brother back. As Belle and Adam draw closer, they learn that the strength of love can tame a beast and shape a princess into a hero.