So, it's done! Humanity, funded by the United World Universities, founded a colony on Mars. Six towers, inhabited according to linguistic principles. Several thousand people from different countries are determined to make this inhospitable planet their home. In conditions of scarcity of water and air, and with the strictest discipline, only the bravest, selflessly devoted to the idea of building a new world, can survive. Difficulties? So what! Tests? Not scary! However, over the past ten years, not a single living child has been born on Mars...