Col. John Randal and Lady Jane arrive in London just before Christmas 1943. They find themselves caught up in the murky world of Military Deception. MI-5 had captured every German spy in England and given them the choice of a firing squad or becoming a double agent working for the Double Cross Committee XX. Raiding Forces has been tapped to carry out the boots on the ground part of Operation Fortitude South-designed to convince Hitler of what he already believed-that the D-Day landing will take place at the narrowest part of the English Channel-in Calais. The invasion when it goes in will actually land in Normandy. The idea is to tie down the German 15th Army in Calais to give the Allies a chance to get ashore and set up a beachhead strong enough to fight off German counter-attacks. Raiding Forces is tasked with conducting a series of raids in Calais to simulate strategic forward reconnaissance/ preparing the battlefield.