The story mainly follows a small group of soldiers, the first of the SOE, who were rescued from Dunkirk and follows them through Operation Postmaster
D-Day Girls The Spies Who Armed the Resistance Sabotaged the Nazis and Helped Win World War II -historical accounts of women spies, tied into a single narrative
The author also tells the stories of the soldier who were arranges in an ever shrinking circle around Dunkirk, protecting the shores and the men from constant attacks by the German army trying to break through.