The SOE spy network set up by Churchill to sow discord in occupied Europe recruited a number of women to its ranks, including 39 agents in F (French) Section. This account of their activities focuses on three leading operatives, Andrée Borrel, Odette Sansom and Lise de Baissac, who played a key part in organizing local resistance units, carrying out sabotage attacks and gathering intelligence crucial to the planning of the Allied invasion.