In a galaxy consumed by a relentless war between the Galactic Empire and the Free Planets Alliance, a young Siegfried Kircheis befriends Reinhard von Müsel and his sister Annerose in the Empire. Their idyllic bond shatters when Annerose is forced into the Kaiser's harem by their father. Helpless against the court's decree, Reinhard departs with his father, leaving Kircheis behind. Upon his return in a military uniform, Reinhard vows to climb the ranks to liberate his sister. Kircheis, unwavering in his loyalty, joins Reinhard in a daring quest to rescue Annerose, determined to stand by his friends no matter the cost.