In the Perseus arm of the Milky Way lies the Cejuru solar system; its major planet, Cejuru Prime. The isolationist Prime, the oldest known hominid species in the galaxy, has fought off the Antarean forays into the outer arms of the Milky Way for millennia. The Antareans are a militaristic, pseudo-reptilian species from the Andromeda Galaxy.
While the Prime have managed to hold the Antarean invasion of the Milky Way at bay, it has been at a great cost to their planet. The Prime female population targeted by the Antareans has been decimated; the few women left have low fertility and mostly deliver male children. The result is a Prime population growth of less than zero.
The Prime Council facing the reality of extinction of their species within the next two generations votes, by a narrow majority, to join the Galactic Alliance. Their reasons for coming out of isolation are two-fold: one, to join forces with the powerful Galactic Alliance Military to battle the threat of the Antareans who even now are venturing further into the more heavily populated arms of the Milky Way and, two, to find compatible females with whom their males can mate.
A small, but vocal minority of the Prime do not wish to dirty their pure bloodlines with other humanoid DNA and are causing trouble at home – – and in space.
This is where the Prime story for survival stands at the beginning of Book One, Prime Obessession.