On the eve of World War II, Krystyna Wituska, a carefree teenager attending finishing school in Switzerland, returned to Poland. During the occupation, when she was twenty years old, she drifted into the Polish Underground. By her own admission, she was attracted first by the adventure, but her youthful bravado soon turned into a mental and spiritual mastery over fear. Because Krystyna spoke fluent German, she was assigned to collect information on German troop movements at Warsaw's airport.

In 1942, at age twenty-one, she was arrested by the Gestapo and transferred to prison in Berlin, where she was executed two years later.