Harry Frobisher returns, blinded and traumatised, from the carnage of the First World War. Arriving at his ancestral home on Bodmin Moor, he seeks reconciliation with his brother, William, following their parents' murder. But another murder has occurred on the moors. There have been sightings of a ghostly woman with red hair. Locals claim that it is Morag Donaldson, former secretary to Lord & Lady Frobisher, convicted of their murders and committed to the asylum. Inspector Edwards arrives from Scotland Yard to investigate the murder and immediately finds that there is more to this case than meets the eye. Can he solve the murder and answer the question on everybody's lips?