They call it the Everbright Estate-a house built on order, etiquette, and suffocating perfection. But for the three Everbright siblings, the house is a battlefield. ​Clara hides behind her perfection, Ember lashes out with her sharp-tongued jealousy, and little Henry tries to hold the crumbling pieces together. They are as different as night and day, until they are plunged into the world of Luminaria-a magical realm on the brink of total darkness. Forced to abandon the expectations of 1930s England, the siblings must face the prophecy that binds them: The Clear, The Spark, and The Oracle. Can three people who can barely stand each other save a world from eternal twilight? Or will their own friction tear Luminaria-and themselves-apart?..