A simple St. Petersburg chemistry teacher lives modestly: for years he walks in the same suit, drives a "hunchback" "Zaporozhets", carries a shabby briefcase. And he does not suspect that a copy of him lives nearby, in the same Petersburg. This person is not at all addicted to chemistry. People like him are simply called a bandit. Sergei Prokhorovich cuts across the vastness of the city on the Neva in a luxurious jeep, leads real boys and pampers his mindless girlfriend. He had never met a chemistry teacher. Until the situation emerges from the classic anecdote about the "new Russian": the teacher's "Zaporozhets" flies into the bandyugan's jeep. Prokhorich leaves the car to deal with the bastard, but, looking inside the "hunchback", freezes: the driver of the "Constipation" is surprisingly similar to him. Brothers. And not a single real kid will ever leave his brother, so from that moment on, the teacher and the bandit go purely through life together, finding themselves in situations one more fun than the other.