XXXVI century... Humanity populated the Galaxy, came into contact with other intelligent races and gave impetus to their development. But in the middle of the fourth millennium, nine extraterrestrial civilizations formed an alliance against humans and started a galactic war. Aliens have occupied human worlds, including Earth. All people who survived the war were relocated to carefully guarded planets, turned into space prisons. Humanity was condemned to slow extinction. However, not everyone was defeated. The small planet Terra Gallia, invisible in its region of the Galaxy, managed to resist countless enemy armadas, turning its local space into an impregnable fortress...