The action of the new novel by the classic of Russian science fiction takes place shortly before the events described in the novel “Season of Fogs.” Inspector of extraterrestrial settlements Rotanov goes to the planet Aroma to investigate an unprecedented case - space tourists who arrived there refuse to return back. On the planet, the inspection team is awaiting a destroyed human settlement and countless attacks from energy monsters. A deadly search for the cause of their appearance leads the inspector to unravel a mystery that threatens to destroy life not only on Earth, but also on many other inhabited planets...