Despite the decisive conquest of near space, humanity is still divided into two political camps. The rocket plane, which is supposed to deliver the secretly kidnapped Soviet scientist Skribin and his daughter Anna to the American lunar base, is intercepted by representatives of another civilization, which is immeasurably superior to the earth in its development. The contact of the two worlds, which almost turned into their collision, was such an interpretation of the most popular theme in science fiction by the Bulgarian writer Pyotr Stypov, who wrote his novel in the Cold War.