In the northern kingdom of Auralis, the sky has been cracked for as long as anyone can remember — split open by Star Veins that bleed silver light across the dark. Every thirteen years, a Starfall comes: star fragments raining down, beautiful and lethal, hollowing out the memories of any soul they touch for too long. Elyra Vane is the last Starbinder of her bloodline — the only one who can seal the rifts, at the cost of her own memories. She has already forgotten her father's face. She is afraid that one day she will forget why she ever fought to remember at all. Caelan Drost is the captain of the Nightwardens, the soldier with platinum ash hair and no shadow. Five years ago he survived a ritual that was supposed to kill him. He has spent every day since believing he was saved by someone who loved him. He was not. He was used. When the largest Starfall in recorded history begins tearing Auralis apart, Elyra and Caelan are bound together by the Starfall Covenant — he protects her body, she protects his soul from Hollowing. But the closer they come to the truth, the more impossible it becomes to look away: the sky was never the enemy, the Hollow King is not the monster they were told, and the love growing between them was engineered from the beginning as the most perfect fuel the city’s machine has ever found. The question is not whether they were set up. The question is whether, knowing that, they choose each other anyway.