"Star Explorers" is a continuation of the novel "Three Captains", on the pages of which readers began to get acquainted with the fate of the Fourth Interstellar Expedition that disappeared in 2161 and a group of enthusiasts who, 450 years later, are trying to unravel the tangle of secrets and mysteries surrounding the fate of the astronauts of the ancient heroic era. So, the investigation of reporter Konstantin Beketov, his friends Anna Nadezhina and Fyodor Smagin continues. It seems that he has great prospects - after all, he managed to find not only a rocket plane from aboard the Voskhod ship, but also a mysterious alien who introduced himself as Commander Er and was personally acquainted with the missing captains of the Fourth Interstellar! But now the officers of the Global Security Agency are coming into play . They have clear instructions: to arrest and interrogate the enthusiasts, to isolate and dissect the alien! Instead of continuing the search for the Zvezda ship, our heroes have to answer questions from GAB interrogators, sitting in the uncomfortable offices of a military base on the planet Bellona. But even the omniscient Global Security Agency has no idea that recent terraforming experiments have awakened a dormant ancient evil in the ice of Bellona...