A young chauffeur Sinichkin receives the first car in his life - a shabby three-ton zis 5B, with the number MV 22-12, brought to a deplorable state "first class chauffeur" Chekshov - a self-confident sild and a malicious violator of traffic rules. Thanks to Sinichkin's efforts, the old car is transformed and brings its driver not only success in labor, but also good luck in his personal life - acquaintance with the tanker Fenechka, for which the attention of which competes with him, he rivals the echezov, crossed into a luxury passenger car(SIS-101). However, Fenechka prefers a young chauffeur who loves his job, rather than a first-class poser and a slacker who has also killed a second car. The film has a happy ending: Sinichkana is trusted with a new"SIS"on which he and his girlfriend hurtles through the expanses of Moscow,and the president, who has not justified the trust of the boss, returns to correct the "machine 22-12".