The Praxis, the empire of now extinct Shaa, has again fallen into civil war, with desperate and outnumbered humans battling several alien species for survival. Leading the human forces are star-crossed lovers Gareth Martinez and Caroline Sula, who must find a way to overcome their own thorny personal history to defeat the aliens and assure humanity's survival.

But even if the human fleet is victorious, the divisions fracturing the empire may be too wide to repair, as battles between politicians, the military, and fanatics who want to kill every alien threaten to further tear the empire apart. While Martinez and Sula believe they have the talent and tactics to defeat an overwhelming enemy, what will prevent their fellow humans from destroying themselves?