1852. Margaret Lennox, a young widow, is offered a position as governess at Hartwood Hall. She quickly accepts, hoping this isolated country house will allow her to leave the past behind. Margaret soon feels there's something odd about Hartwood: strange figures in the dark, tensions between servants and an abandoned east wing. Margaret is certain that everyone here has something to hide, and as her own past threatens to catch up with her, she must learn to trust her instincts before it's too late...