When reclusive war poet Olivia Marlowe and her half brother Nicholas Cheney die together in their ancestral home on the Cornish coast, it looks like suicide. The grieving relatives gather together to discuss the fate of Barcombe Hall, when another shocking death occurs. Inspector Rutledge, who is still shell-shocked from his experiences in the Great War, is sent from Scotland Yard to investigate. Rutledge is soon convinced that the answers to this baffling case lie within the family's secret history.