1943. Belarus. Captain Alexey Makarov of SMERSH is tasked with finding and evacuating to a safe place the archives of the Abwehr school. The Germans are also hunting for the documents left behind during the retreat. Makarov’s group is ambushed. Everyone except the captain dies. Wounded, he is taken in by partisans led by the senior lieutenant of the NKVD, Emma Kushinskaya. They have the same mission as the counterintelligence officers: to prevent the fascists from taking the secret archives to Germany. Makarov and Emma prepare a daring operation to capture the papers. When everything is ready for a swift strike, their comrade suddenly decides to reveal to the captain who she really is…