The space battleship Star Swarm, exploring the Large Magellanic Cloud nebula, discovers a hitherto unknown community of Fifty Suns. The inhabitants of this world, distant descendants of earthlings, consist of two main groups - Dellians, biological robots, and non-Dellians, practically ordinary people. But among them there is a third group, almost superhumans - the Mesodelians, who plan to take full power in this interplanetary state formation into their own hands.