Christmas, 1940. A temporary truce between the German and Allied forces is awelcome respite from the relentless air raids over London.Down Street underground station, in the heart of Mayfair, is now a secretretreat for Prime Minister Winston Churchill and his cabinet. In this supposedlysecure location, the body of a woman is found, stabbed in the heart. Detective Chief Inspector Coburg and Sergeant Lampson are called toinvestigate. However, whispers of treason as well as the suspicion of insidiousRussian plots muddy the waters of the case, and personal resentments strikefar too close to home. Everything is on the line for Coburg and Lampson as the body count steadilyrises.