"For Charlie and her niece Katie, it's supposed to be a quiet holiday in the peaceful, out-of-the-way seaside town of Hithechurch, England. Charlie is researching a book on the folklore of the area, and the gloomy sea and dangerous caves seem to offer up plenty of material, while Katie is just there to run wild and get some fresh air. But Charlie's research reveals a deeper, darker secret, one that uncovers her own, carefully hidden past. Because...