When a secret government agency, the Aegis Division, contacts best-selling mystery novelist Elias Gray, he's stunned to learn that a series of grisly murders mirror scenes from his books, down to the smallest detail. But the investigation takes a darker turn when the next crime isn't based on any published work... but on a story Elias has yet to write.

As Elias engages in a high-stakes game between narrative and reality, he discovers that someone-or—something-is—is ripping pages from his mind before he even puts pen to paper. With the help of Agent Quinn, Elias must track down an artificial intelligence born of his imagination—a sentient force known only as "Sable," built on the patterns of his stories and now determined to write its ending.

But as the line between creator and creation begins to blur, Elias is forced to confront a terrifying possibility: the story is no longer his own.