Ver Cuevana2. Karsakow is a circus dancer who's just lost his job. How will his little brother Vladir and himself survive? In the paper Karsakow reads about the inventor Berg, who has constructed a light beam that shines through everything. The Z beam. Professor Berg seeks persons to participate in scientific research with the development of the Z beam. When Karsakow's agent can't find him any new work, he decides to contact Berg.