It's 1938, and war is looming as Lilly Divine leaves London for life as a governess in a crumbling mansion. Her employer, Gethin Taran, a man as remote and compelling as the mountains encirlcling his home, soon has Lilly intrigued and enthralled. But there is danger as well as passion in the valley, and its ghostly source begins to stalk Lilly's nightmares...