1942, Nazi-occupied France. Sandrine, a spirited and courageous nineteen -year-old, finds herself drawn into a Resistance group in Carcassone - code named ‘Citadel’- made up of ordinary women who are prepared to risk everything for what is right. And when she meets Raul, they discover a shared passion for the cause, for their homeland, and for each other. But in a world where the enemy now lies in every shadow - where neighbour informs on neighbour, where friends disappear without warning and often without trace - love can demand the highest price of all.