France, 1942. In Carcassonne, a colorful historic village nestled deep in the Pyrenees, a group of courageous women are engaged in a lethal battle. Like their ancestors who fought to protect their land from Northern invaders seven hundred years before, these members of the resistance--codenamed Citadel--fight to liberate their home from the Nazis.But smuggling refugees over the mountains into neutral territory and sabotaging their German occupiers at every opportunity is only part of their mission. Thesewomen must also protect an ancient secret that, if discovered by their ruthless enemies, could change the course of history.
