After the great catastrophe that was created by human hands, those few who were strong in spirit and body found refuge in a well-equipped city. The dome, which hides them from the unfavorable external environment, does not provide its protection to everyone, and only the female part of the expedition passes through the impenetrable barrier. Their life is a utopia. But the found laboratory provides a way out. Now life continues through artificial insemination. When the number of men and women becomes almost equal, a struggle for power begins, after which it was decided to build a New City, where men could rule without claiming the territory of the Main City. In this world, the story develops that happened with Lin, a girl living in the Main City, preparing to undergo a fertilization procedure in the New City...