After a three-year gap post their space journey, Lafiel Abriel and Jinto Linn reunite, with Lafiel leading the attack ship Basroil and Jinto serving as her supply officer. The resumption of the Abh Empire's war against the Triple Alliance propels the inexperienced pair into the heart of the brutal conflict. Amidst the intense battle pitting humanity against the Abh, both factions come to grips with the deeper clash revolving around their fundamental disparities rather than mere territorial disputes.