This adventure film deals with a Soviet scout operating behind wartime lines.

A Soviet intelligence officer was sent to the territory of pre-war Germany to check an intelligence network. The network has failed, he is sending information about the impending attack of Nazi Germany on the USSR. However, the state security agencies do not believe him, they want to liquidate him and give him the task of personally verifying the reliability of his last appearance. He completes the task and, although contacts with him cease, he continues to act independently without the support of the 'center'.—Tango Papa