Earth - 2157 - Paul the Texan and Leika the Siberian are two computer technicians belonging to the "Inter-Nation Alliance". Their mission is to take care of possible problems concerning the 4 "ORDI" satellites in charge of securing the inter-space flights between the earth and its colonies. The probabilities that a satellite "ORDI" presents a failure one day are almost null....but one day "ORDI 4" presents a defect of pressurization. Paul and Leïka are sent on site to understand where this defect comes from and how to fix it. What they will discover will change forever the status of Humanity in the Universe... Freely inspired by a short story by Isaac Asimov