Lilagin, an engineer, came to Zero City, a city without coordinates. Everything there is puzzling. He found the secretary of the factory director sitting naked behind the table typing, and no one was surprised by the passers-by. Varagin asked the factory director to meet one of his requirements, and the factory director agreed, but he said he would get in touch with the chief engineer, and the female secretary told Varagin that the chief engineer had drowned eight months ago. Varagin came to a restaurant for dinner, and the chef sent a head-shaped cake. Varagin found that the "head" was exactly the same as his own head. When Varakin was in amazement, the cook was suddenly killed. Then the detective attorney general told Varakin that the cook was his father.