A Soviet expedition sent to Central Asia encounters a mysterious black ball - the Drion starship, which flew from the depths of the Universe. Alien astro-pilot Miel makes contact with expedition member Yuri Kartsev. Miel believes that earthlings are sick with guolla - a disease that generates and develops aggression and conflicts in people and intends to de-guollaize the planet. This action was prevented by an attack by the Basmachi. Yuri saves the wounded Miel, takes her to Drion, and the ship, obedient to the biocurrents of his brain, is sent into outer space. Mielle was saved. Thanks to black holes leading somewhere into the “cellars of the Universe”, Drion quickly arrives in a kind of imperial state - the Union of a Thousand Planets, led by an artificial brain - the Great Coordinator. The Empire carried out de-wallization, but at the same time subjugated thousands of planets. A threat looms over the Earth. Thanks to smart and decisive actions, the earthling managed to capture Drion and arrive on it to the reserved planet Fabiola, on which Driones were “grown” by plant means. Yuri Kartsev managed to thwart the plans of the aggressors and, together with Miel, who fell in love with him, returned to Earth. Unfortunately, over the High Tatras, a passenger plane crashes into Drion...