The discreet and shy Katia, who came from around Kursk with some friends, finds herself in a group of workers working on the construction of a national road. She is in love with Vassia Plotnikov, a happy boy driver of renowned machine. But he is only interested in his success at work and with girls. Katia is transferred to another part of the site where the firmness of her character quickly reveals itself and where she becomes an avant-garde worker. /