The story is about the unusual adventures of the young man Steam Taggart, whose compatriots live on a giant starship, looking for a planet suitable for colonization in space. From early childhood, Steam believed that his destiny was much greater than the fate of becoming an ordinary engineer. Finding himself accidentally torn away from his home on a distant planet in an alien, frightening world, Steam will not lose his presence of mind, but will continue to fight for survival along with the indigenous inhabitants of Baghara against the cruel galactic entrepreneur. On her side are high technologies and an uncomplaining army of ruthless killers, but the native priests from time immemorial have been using sensi crystals in the war, which are a powerful source of mysterious energy. Having heard about the existence of crystals, also known as void stones, desperate adventurers from the Dead Echo gang, led by the legendary mercenary nicknamed Ghost, arrive on the planet. Having accidentally found himself among the earthlings, Steam eventually develops respect for people for their courage and dedication. The young Solarian soon becomes an integral part of the crew of the neutron cruiser Leviathan. The Milky Way Galaxy is currently in turmoil. Strange creatures from the necrosphere and clandestine communities unite for a common goal. What awaits the young Solarian and his new friends from the Dead Echo team on the ocean-covered planet Arcadia? Where did the secret religious order of Thule get the forbidden technologies and knowledge of the necrosphere that allow them to revive the dead? Who are the Two-Faces and why did they disappear millions of years ago? All answers await Steam in the heart of darkness - in the quasar jet.