This world is like ours, but it has air. Ether is the fabric of the universe and under normal conditions, it is not much distinguishable from emptiness, but if the ether becomes "hot," then it can be controlled. It looks like magic, but with its own laws and restrictions, and the ether also has limits, and everyone has their own limit from birth. There are ethereal stars in this world, it is they who warm up the ether to the state... But this is not the story, Oleg is an ordinary guy living in Moskvagrad and working in a Soviet observatory. And Oleg... However, this is already a spoiler, and there is also an emperor in the book - Rafael and his Shadow Sister - Ram. And Allies or pets who change their owners in different ways, complement them or disfigure them.