LONDON, 1944. As Operation OVERLORD looms, the British Secret Service devises an audacious scheme: the false-flag recruitment of a German admiral who secretly is a communist. There isn't much time. The admiral will be approachable only during the brief window when he travels to neutral Sweden at the head of a Nazi delegation. For the daring gambit to succeed, the British first must borrow from the Americans a brilliant young analyst, Linnea Thorsell, setting in motion her rigorous preparations, infiltration, and the ultimate showdown in Stockholm.