After researcher Yuri Sergeev fails to report to work, local police officer Ilya Sergeev opens an investigation into his disappearance.

This is a last of 3 movies about 3 friends (the other two are "Kortik" and "Bronzovaya Ptitsa"). The gang has grown up and in this movie they discover and help to stop criminal activity on the factory and in their neighborhood.

After serving in the army, Lyonka Parasochka got a driver in the fleet, deciding to continue his father's tradition. His mentor was Pyotr Demyanovich Volovich, who knew how to make money by "left trips" and various "operations". Lyonka saw that Volovich lived widely, beyond his means, but at first he somehow did not think about the sources of wealth. Apparently because he was in love with Volovich's daughter Lyusya.

Based on the story "Echelon to Germany" by Ivan Shamyakin.