Sorrel Vane has hidden her nature her whole life — a wick in a world that burns her kind on sight. When she instinctively drinks a Warden’s flame to save a dying child at a public tithing, she accidentally siphons the power of Castien Aldermoor, heir to the Ember Throne, and forges a forbidden soul-bond: their lives are now knotted together, so if one dies, both do. Unable to turn her in without dying himself, Castien hides her — and together they uncover the lie the Pyre is built on: wicks aren’t cursed thieves but the last of the Ashkeepers, the only people who can break the kingdom’s economy of stolen years. As the Grand Pyre Lord moves to drain the entire city in a single “Long Burning,” Sorrel discovers she can turn the channel both ways — and pours three centuries of hoarded life back to the people, freeing the dead and shattering the Pyre. Book One ends with the bond becoming a choice instead of a chain, and a far-off tower full of caged fire beginning to call her east.