On the floating island of Ashveil, the ground breathes and the ash remembers. Averyn Solis is a runner — fast feet, sharp eyes, no inheritance worth naming — until the day a Rift tears open in the goat road and something inside her answers it. Ash moves away from her palms in slow rings. A voice she has never heard speaks her name. And her aunt, who has raised her on silence and sharp bread, finally says the word mother like it costs her blood. Soulbind is supposed to be a thing of distant islands and old songs. Powers shaped by the heart's quietest cravings. Pacts with spirits who do not forgive. Averyn knows none of it — until the Rift opens, and the island starts to answer something that has been asking for a very long time. To survive what is coming, she will have to cross the Shattered Isles: the wind-carved spires of Galehaven, the illusion-drowned marshes of Shadowfen, the mirrored halls of Lumina. She will have to learn what she is before the wrong people learn it first. And she will have to decide what to do about Kairo Vance — the cold, brilliant stranger who already knows her name, who watches her the way a scholar watches a key turning in a lock he has been studying his whole life, and who is either the only person who can teach her what she is, or the reason she was hidden in the first place. Some bonds are made of trust. Some are made of need. And some are written into the bones of the world long before the people wearing them ever meet.