Sara, the American wife of a French aristocrat, has had two encounters with her compatriot Cedric Killian, one a youthful idyll in North Carolina and the other during the First World War, when he was a soldier about to go to battle. When, years later and after the death of her husband, Cedric contacts her out of the blue, Sara finds herself eager to see him again - against the wishes of her in-laws - and to find out the secret of this man she loves yet knows so little about.