Young women toiling in a factory are exposed to hazardous material which takes a disastrous toll on their health.

The story of Vera Atkins, a crafty spy recruiter, and two of the first women she selects for Churchill’s “secret army”: Virginia Hall, a daring American undaunted by a disability and Noor Inayat Khan, a pacifist. These civilian women form an unlikely sisterhood while entangled in dangerous missions to turn the tide of the war.