One century after Darius II, the planet Darius continues to face relentless assault from the Belser Army. A new weapon has been developed — the Burst System, equipped to the latest generation of Silver Hawk fighters — which may finally turn the tide of an ancient war. Test pilot Riga Pratica and Ti2, a computer AI inhabiting the body of a young girl, take these new craft into battle against the Belser fleets, factories, and fortress strongholds.