In deep space, ships of the Earth Federation disappear in the most mysterious way. Agent Neverov of an Earth special service is sent to a distress zone, but on exiting hyperspace his ship—and its passengers—end up on a sinister planet not marked on star charts. There is no life there—only predatory creatures that thirst to take control of people’s minds. But Neverov manages to overcome all the trials, neutralize his enemies’ plans, and find on the lost planet what he so lacked back on Earth.