Surrounded by family secrets, suspicious deaths, and her own repressed memories, fifteen-year-old Clara Willenheim lives as a prisoner in her ancestral estate in 1860s Bavaria. Her only chance of escape is to journey through the castle’s secret passages, unraveling her family’s dark history and its place at the center of a vast web of crime. Driven by the capricious and vengeful ghost of her long-dead aunt, Clara opens doors that threaten powerful enemies and force her to choose between righting past wrongs or losing her own life.