Ellie disappears from a party one night--vanished without any solid leads, and gone for two years. Until, suddenly, she reappears on a hiking trail. She's clearly traumatized, and thin, but without any signs of struggle. Did she escape? Was she let go? Detective Chelsey Calhoun struggles to put the pieces together, determined to save any girls she can--in part driven by the death of her sister fifteen years ago. I won't give anything away here, but the book is tightly-wound and suspenseful, and by the time I was 2/3 of the way through there was not a chance I'd put the book down until it was finished. Gripping, interesting, and entertaining book.