Maisie's attempt to help brings to light a decades-old mystery concerning her first husband, James Compton, who was killed while flying an experimental fighter aircraft. The deeply personal investigation leads her to a ghostly figure who is grappling with the weight of his own conscience and the outcome of the part he played during the war.
This final instalment in the internationally bestselling series will challenge so much of what Maisie understands about her life and forces her to question what she has always accepted to be true.