The rich man Bubnila, who in every way knocks out taxes from the townspeople, discovers in the laboratory of his debtor - Art, a professor of all kinds of sciences, a mechanical toy - a boy with transparent blue eyes. He decides that he can make a fortune on this invention. But soon the rich man has a competitor - the insidious doctor Capa, who orders his bandits to find and kidnap the robot. The doctor dreams of finding out the principle by which this robot is assembled, and creating a thousand of exactly the same boys. He will no longer need henchmen, as one robot will replace ten gangsters.