Aspiring author Ivy Seidel accepts a part-time position teaching writing to a group of convicted criminals hoping the experience will add depth and darkness to her own work. But in the haunting writings of charismatic inmate Vance Harrow she discovers a talent possibly greater than her own. And in the startling, disturbing stories Harrow has to tell, Ivy finds a dangerous new purpose—and a terrifying temptation that lures her into an inescapable world of shadows.