In a picturesque English village, Joan Stanley (Judi Dench), lives in contented retirement. Then suddenly, her tranquil existence is shattered as she's arrested by MI5.
We cut to Cambridge in the 1930s, and the young Joan (Sophie Cookson) falls in love with Russian saboteur, Leo. Through him, she begins to see that the world is on a knife edge and perhaps must be saved from itself in the race to military supremacy. Post war, Joan is confronted with the impossible: Would you betray your country and your loved ones, if it meant saving them? Inspired by an extraordinary true story.
Director: Trevor Nunn
Cast: Judi Dench, Tom Hughes, Sophie Cookson, Tereza Srbova
Running time: 1 hour 41 minutes