The Republic of Chaonia fleets, under the joint command of Princess Sun and her formidable mother, Queen-Marshal Eirene, have defeated and driven out an invading fleet of the Phene Empire, though not without heavy losses. But the Empire remains undeterred. While Chaonia scrambles to rebuild its military, the Empire's rulers are determined to squash Chaonia once and for all. They believe their military might is strong enough to defeat the enemy, but they also secure a secret alliance with a deadly religious sect skilled in the use of assassination and covert ops, to destabilize the republic.

On the eve of Eirene's bold attack on the rich and populous Karnos System, an unexpected tragedy strikes the republic. Sun must take charge or lose the throne. Will Sun be content with the pragmatic path laid out by her mother for Chaonia's future? Or will she choose to forge her own legend? Can she succeed despite all the forces arrayed against her?