In 2048 A.D., the center of the United Government of Humanity was moved from the 3rd planet of the solar system(Earth), to the 2nd planet of the Aldebaran(Taurus a) system(Deoria), where the declaration of the founding of the Galactic Federation was made, and the year was changed to the first year of the cosmic calendar.
With the advancement of controlled nuclear fusion, subspace jump navigation, gravity control and inertial control, the human sailed to the vast sea of stars in space ships in order to explore the unknown world of space.
However, these wanton interstellar voyages have also attracted the attention of other civilizations in the universe.
In the 12th year of the cosmic calend...