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.
