When Nazis invade Poland, newlywed Emma Bau escapes to Krakow to live under an assumed name as a gentile. To get Nazi secrets for the Resistance, she risks her safety, and marriage vows.

Becoming a spy for the resistance after the Nazi's invade Poland, Emma Bau, taking on a new identity as a gentile, becomes a high-ranking Nazi official's assistant and, leading a double life, compromises her marriage vows, her safety, and the lives of those she loves for the cause.

1945. Marta marries a caring British diplomat and glimpses the joy that home and family can bring. But her happiness is threatened when she learns of a Communist spy in British intelligence.