As the daughter of Proxima Prime's leading Xenoarchaeologist, Jahenna Malnix has a chip on her shoulder. She dreams of exploring the stars like her father, but wants nothing to do with an education that's simply handed to her. Joining the Espatier Corps, Jahenna plans to earn her education with the life of a peacetime soldier: humanitarian aid, rescue missions, and training exercises... ...but when war breaks out, Jahenna and her compatriots must fight a new kind of war: one where the battlefield stretches across lightyears, and air becomes as vital as food, ammunition, and water.