Estelle's life is pretty boring, all things considered: she doesn't have much to worry about, she spends her days on archeological digs deep below the surface of Mars and writing scientific articles on the aliens who ruled over the Solar System many millennia ago.
But nothing lasts forever. Unexpectedly, Estelle and her mentor unearth long-lost knowledge which, if revealed, could dramatically shift the balance of power between nations, and possibly even turn the ongoing cold war between the major factions in the Solar System into a blazing hot one.
So now Estelle has to flee, leave her home behind in a bid to keep that knowledge from falling into the wrong hands; and along the way, she'll have to decide where the lines of loyalty are drawn... and whom she can trust.