First World War. Lvov during its occupation by Russian troops in 1914–1915. A military lawyer, staff captain Pavel Belinsky, arrives from Petrograd to the front at the disposal of the headquarters of the Eighth Army. Shortly before this, a certain Vladislav, a subject of Austria-Hungary, was detained in Warsaw on suspicion of espionage Langert. During the search, in addition to a large sum of money and a notebook found on him, an identification and a pass for rail travel to Lvov were found in the lid of the cigarette case. Langert admitted that he was recruited by German intelligence and transferred across the front line to Warsaw with the task of getting to Lvov. Belinsky will play the role of Langert.