In 1943, America thought it had rounded up all the German spies on its soil. Now Germany's greatest weapon - a woman with special talents, both for tradecraft and for death - is headed home with critical information about the still-developing atomic bomb, and the Allies chief hope for stopping her is a British agent with agendas of his own. Originally recruited into MI5 to pose as a double agent, he's been telling Germans that he'd do anything to free his wife, a prisoner of a German concentration camp in occupied Poland. This happens to be true. The question is: how much would he really do to set her free? Where are his loyalties exactly?