With magic that can shake the heavens and a lazy streak that rivals a cat’s, Astrid has spent her life tucked away in a cottage protected by her grandfather. But when the silence of his death replaces his laughter, she is left with a single, impossible promise: Go to Seraphine Academy. Don't kill anyone. Try to make friends. But Seraphine is no ordinary school. Within hours of arriving, the floor vanishes, and Astrid is dropped into The Extermination—a brutal 90-day survival game designed to weed out the weak. In a world where "kill or be killed" is the only law, Astrid must protect her new friends and survive the slaughter—all without breaking her vow to never take a life.