According to the story of the same name by Yulian Semyonov. Employees of the Moscow Criminal Investigation Department - Colonel Alexei Pavlovich Sadchikov, Major Vladislav Nikolaevich Kostenko and Senior Lieutenant Valentin Roslyakov are investigating the impudent robberies carried out by a group wearing dark glasses criminals. The City Savings Bank was robbed. The investigation of the crime indicated the involvement of a teenager, who soon came to the criminal investigation himself. With his help, the robbers who were preparing the next raid were caught. But the most dangerous criminal — "Prokhor" — is still free...

Young Mitya, comparing his father's home photo with the picture in the newspaper, realized that he had to go to the Arctic coast to finally meet his father. But the wait for the meeting turns out to be long, because the young man himself is not ready for this, and then, having personally learned about life at the polar reserve airfield, he is no longer so irreconcilable and does not attach such crucial importance to the meeting with his father.