After the Third World War, a terrible environmental disaster occurred. The missiles, which were aimed at their targets from different countries, were destroyed in the air. And along with them, the ozone layer was almost completely destroyed. From now on, people could not breathe freely on the streets. In the shortest possible time, humanity, realizing what they had done, developed huge stations for obtaining oxygen from water. Houses and apartments were equipped with special ventilation systems, as well as sealed facades. To go outside, you had to put on an oxygen mask and a tank. Naturally, the stations were owned by huge corporations - the Powers of This World, who sold oxygen. The phrase “Making money out of thin air” has become more relevant than ever. Most worked to breathe! But there were also those who were constantly looking for a way to restore the ozone layer. The owners of the corporations, of course, did not like this, and laboratories that were not sufficiently protected quickly ceased to exist.