44 B.C.. Rome is the capital of the civilized world, its hegemony stretching from the Ocean to Asia, from Gaul to Egypt. No army can stand against the might of the Roman legions and their guns… Motor chariots speed through the streets, steam trains connect the remotest provinces to the Eternal City. The architect of these conquests has a name: Gaius Julius Caesar, the brilliant scientist and entrepreneur who, forced by Sulla to abandon his political and military career, devoted all his ingenuity to science and its technical application…
But far away, beyond the dark and boundless night of space, an aged and dying Race peers, with mute hostility and envy, at planet Earth, scrutinizes Rome and its conquests… From their barren and arid world, buffeted by winds and storms and shaken by earthquakes, alien beings watch, with unmoving hatred, who has what they can no longer have… They see humans grow and multiply, tame animals and cultivate the land… And then they mine coal, ply the seas with motor ships and the earth with mechanical vehicles. And they make a decision: it is necessary to stop the earthlings before they become too dangerous.
It is necessary to destroy Rome.