On top of the Yorkshire Moors, in an isolated spot carved out of the barren landscape, lies White Windows, a house of shadows and secrets. Here lives Marcus Twentyman, a hard-drinking but sensitive man, and his sister, the brisk widow, Hester. When Annaleigh, a foundling who has fled her home in London, finds herself at the remote house, in service to the Twentymans, she discovers all is not as it seems behind closed doors. Isolated and lonely, Annaleigh is increasingly drawn to her master. And as their relationship intensifies, she soon realises that her movements are being controlled and her life is no longer her own. Slowly she is drawn into a web of intrigue and darkness, and soon she must face her fears if she is to save herself.