In 1943, after the defeat of German troops near Stalingrad, the Abwehr carries out a carefully prepared and perfectly planned operation to discredit the Soviet commander K.K. Rokossovsky. And it almost succeeds. After his arrest and accusation of treason, repression among the top command of the Red Army (RKKA) would inevitably follow. And that would mean the collapse of the USSR and the inevitable victory of the Reich, because decapitated and demoralized Soviet troops could hardly withstand the German summer offensive. In Rokossovsky’s defense speaks the NKVD general Ermakov. Contrary to Beria’s direct order. But under Stalin’s protection… However, the Supreme Commander sets extremely strict deadlines for checking the data.