The German Embassy in Buenos Aires is still reeling from the implications of the defection of the Froggers. A senior SS operative, Brigadeführer-SS Manfred von Deitzberg, who took part in the previous investigations into the mysterious killings, returns to Argentina, in part to locate the Froggers, in part to continue to uncover the traitor or traitors in the Embassy, and finally to continue work on the plan to relocate the Nazi leadership to Argentina in the event of setbacks on the European front. Meanwhile, back in Europe, the plan to eliminate Hitler (referred to as Operation Valkyrie), secretly picks up speed, even as the Nazis plan and execute the rescue of Benito Mussolini.