Escape to Danger (1943)

Joan Grahame (Ann Dvorak), an English teacher in Denmark, appears to be working for the Axis but is really a double-agent doing her duty for the Allies. The Nazis send her to England on a spying mission to learn the invasion plans of the Allies. She is trailed and exposed by Arthur Lawrence (Eric Portman), an unconventional British secret agent, that puts her between a rock and a hard place.