It is 1944 and the Allies are preparing for the invasion of Europe. In the occupied town of Sainte-Cecile, the French Resistance is preparing to blow up the chateau that now houses the crucial telephone exchange connecting the French telephone system to that of Germany. Bombers have been unable to inflict enough damage on the chateau to disrupt communications for more than a few hours at a time, but the Allies need to make sure that communications is down for longer so that there will be as little warning of the invasion as possible.
Felicity Clariet, known as Flick, is a British secret agent patrolling the streets around the chateau waiting for the first explosions that will give the signal for the attack to begin. She is married to Michel, a Resistance fighter. When the operation goes horribly wrong, they barely escape with their lives and Flick returns to her home in London--but not for long. When Flick returns to France it will be as part of an audacious, quickly assembled plan to put female spies in the chateau as telephone operators and cleaners, enabling the Allies to destroy the ability of the Exchange to warn Germany in advance of the landing on the beaches of Normandy. The twists and turns of the plot will keep you on the edge of your seat.