Betty, an American teenager in living in Britain, is determined to contribute to the cause when the Germans begin bombing London in World War II. Instead of collecting scrap metal or running air raid drills like most girls her age, Betty lies about her age and trains to become a spy and member of the Special Operations Executive. Now known by her secret agent persona, Adele Blanchard, she soon finds herself parachuting over German-occupied France in the dark of night to join the secret Resistance movement.
Adele's missions in Paris and throughout the French countryside delivering top-secret messages, lead to several close calls with the Gestapo, but it's when she crosses paths with a young American pilot that Adele fully realizes the brutality of this war and the seriousness of her circumstances. Plus her changing feelings for this pilot are as uncertain as their future. Can Adele elude the Gestapo long enough to enjoy the future they are trying to protect?