Uncovering a diabolical Nazi plot, Marge Emerson is secretly reassigned to a medical post in France. There she meets a conscientious objector and finds his outspoken belief in God a challenge to her own fragile faith. When David shares his desire to return to Europe after the war and build an orphanage for Germany's homeless children, Marge is drawn to this selfless, compassionate man. Meanwhile, Marge's sister, a war correspondent, is recruited for intelligence work by an American Secret Service agency and quickly becomes involved in an intricate web of espionage.
When Marge and Em are unexpectedly reunited in France, they attempt a daring rescue. They must try to escape the sinister forces that are closing in on them.