1943 Bavaria. "Alistair Valentine is a British agent working in deep cover as a German chauffeur. In a limousine outside the Führer's mountain retreat in Austria, he overhears a snippet of conversation between Admiral Canaris and Field Marshall Rommel. Hitler plans an aerial offensive against England. Ten high-speed ballistic missiles, primed with Tabun nerve gas, will strike five strategic targets, including Windsor Castle and RAF Biggin Hill. The attack will be unexpected and unstoppable. Alistair must risk signaling spymaster Brimblecombe in London to warn him." That is about the time that Brimblecombe sends Freddie in to help.