
1939 setting: A bold and determined woman named Krystyna Skarbek, motivated by the safety of her mother, convinces a mysterious British agent called Trenchcoat to allow her to infiltrate Nazi-occupied Poland for intelligence gathering. However, the mission doesn’t go as planned, causing Krystyna great personal loss and fueling her determination to make her life meaningful.
Four years later, having endured the horrors of war and earning respect, Krystyna is dropped into southern France. Her task: evaluate the fractured French Resistance and approve a significant British arms delivery. Assuming the guise of a schoolteacher, Krystyna infiltrates a precarious network. Betrayal emerges, putting the resistance at risk, but Krystyna disobeys orders and takes a daring stance. Alongside her few allies – including the legendary but damaged spy Roger and the tenacious resistance leader Armand – they lure German intelligence hunters into a deadly trap, bringing hope for victory.
Yet, the war has even more deception and danger in store… Krystyna chooses to confront these challenges head-on, as she embarks on the mission that will shape her legacy, wounded and standing alone.