Year 20XX. At the end of the Third World War, the ratio of men and women is 1 to 20,000. For the restoration of the population, various repopulation programs are being carried out by the country, for example, in Japan, suitable for the parameters young people are given a special H.F.F. a map, upon presentation of which any fertile girl is obliged for some "contribution" to help fill the population of the Earth.