Martha Wells, author of the beloved Murderbot series, delivers a fantasy novel following Kai, a demon with power over pain and death, who wakes after being murdered and trapped to find the world changed in his absence. Kai must gather his old allies and discover who imprisoned him and why, navigating political conflicts between mortal kingdoms and the immortal powers that move behind them. Wells builds a richly imagined world where demons and humans have complex relationships, where magic systems obey their own logic, and where past events continue shaping present conflicts. The narrative alternates between Kai's current investigation and flashbacks to his earlier life, revealing his history and relationships while advancing the present-day plot. Wells brings the sharp characterization and dry humor that distinguish her science fiction to an epic fantasy setting, creating a protagonist whose demonic nature does not prevent genuine emotional connection. The book explores power and its costs, the obligations of long-lived beings to those who will die before them, and what it means to choose sides in conflicts larger than any individual. Wells demonstrates her versatility while maintaining the qualities that have made her one of contemporary science fiction and fantasy's most popular writers.