"Rosemary Tulle has come to Halcyon Hall desperate to find her younger sister. Seventeen-year-old Genevieve left a brief, troubling message on Rosemary's phone, begging to be picked up. But Rosemary is not on the visitor list, and no one will let her in . . . Halcyon Hall was once Bainesworth Manor, an asylum for the insane. Such places often draw whispers about gruesome treatments and tortured inmates. In the case of Bainesworth, the reality may...