In a distant future, a war between two superpowers ensues in outer space. With resentment toward their superior, a young commander leads an armada of battleships to conquer the sea of stars.

Reinhard von Müsel, a poor nobleman's son, one day discovers that his sister, Annerose, has been sold to the royal family. To get her back he sets out to rise quickly through the military along with his friend Siegfried Kircheis.

In the year 796 UC (Universal Century), an intense battle takes place between the Galactic Empire and the Free Planets Alliance. The story follows the young military genius Reinhard von Lohengramm as he strives to rise to power and bring an end to the corrupt Empire. Meanwhile, Yang Wen-li, a talented strategist from the Free Planets Alliance, seeks stability and peace in a war-ravaged universe. As their paths cross, the fate of the galaxy hangs in the balance.