American Ellenor Jantz lives in rural Germany in 1917, the Great War raging only a few miles from where she works as a beekeeper for a wealthy loyalist. When a British airman crashes behind enemy lines, Ellenor must choose between aiding him or handing him over to the German authorities, who have just moved a squadron of flying aces into the manor house where she is staying.

Injured pilot Alec Corbin-Dawes, Royal Flying Corps, finds himself at Ellenor's mercy. Yet he is determined to make his way farther into Germany to rescue his sister within the next four days. How can he travel all those miles in time, now that his plane is downed, and still avoid capture behind enemy lines?