Lelya Sergeyeva, a Komsomol girl, comes to Moscow to speed up the production of ball bearings needed by the MTS where she works. The heroine is involved in the social, sports and personal life of the members of the youth brigade and after the fulfillment of her order leaves the factory, which greatly upsets the foreman Staroseltsev, who at first clashed with Lelya. Considered lost.
