Sequel to the 1967 film "Marianna" based on the autobiographical account of Soviet spy Praskovia Didyk "In the rear of the enemy".
The action takes place in 1944 in a Polish town occupied by the Nazis. The Soviet spy who hides himself under the name of the major of the German medical services Kurtz and the radio telegraph operator Maria have for mission to obtain the maps and the diagrams of the fortifications ...