The film centers on British intelligence officer Vera Atkins, played by Katic, and two of the women she sends to France as spies, Virginia Hall (Thomas) and Noor Inayat Khan (Apte). Atkins is a crafty recruiter with a secret of her own. Hall is a daring American with a wooden leg who was the first female field agent and ultimately the spy the Nazi’s dubbed “the most dangerous of all,” and Khan is a pacifist of Indian descent who was the first female wireless operator. These civilian women form a sisterhood while entangled in missions to turn the tide of the war. source