Three separate alien societies have claims on Cavanagh's Star. But the new arrivals -- the gethes from Earth -- now threaten the tenuous balance of a coveted world.

Environmental Hazard Enforcement officer Shan Frankland agreed to lead a mission to Cavanagh's Star, knowing that 150 years would elapse before she could finally return home. But her landing, with a small group of scientists and Marines, has not gone unnoticed by Aras, the planet's designated guardian. An eternally evolving world himself, this sad, powerful being has already obliterated millions of alien interlopers and their great cities to protect the fragile native population. Now Shan and her party -- plus the small colony of fundamentalist humans who preceded them -- could face a similar annihilation . . . or a fate far worse. Because Aras possesses a secret of the blood that would be disastrous if it fell into human hands -- if the gethes survive the impending war their coming has inadvertently hastened. "

Shan Frankland forever abandoned the world she knew to come to the rescue of a lost colony on a distant and dangerous planet -- a hostile world coveted by two alien races and fiercely protected by a third. But in the course of her mission, she overstepped a boundary and stumbled into forbidden lands. And she can never go back -- to being neutral, to being safe. To being human.

War is coming again to Cavanagh's Star -- and this time, the instigators will be the troublesome gethes from the faraway planet Earth. Former Environmental Enforcement Officer Shan Frankland has already crossed a line, and now she is a prize to be captured ... or a threat to be eliminated. But saving a coveted world and its fragile native population may require of her one unthinkable sacrifice: the destruction of her own ruthless, invading species.

Three strikingly different alien races greeted the military mission from Earth when it reached the planet called Bezer'ej.

Now one of the sentient species has been exterminated -- and two others are poised on the brink of war.

The fragile bezeri are no more, due to the ignorant, desperate actions of human interlopers. The powerful wess'har protectors have failed in their sworn obligation to the destroyed native population -- and the outrage must be redressed.

But those who are coming to judge from the World Before -- the home planet, now distant and alien to the wess'har, whose ancestors left there generations ago -- will not restrict their justice to the individual humans responsible for the slaughter. Earth itself must answer for the genocide. And its ultimate fate may depend on a dead woman: former police officer Shan Frankland, who became something far greater than human before destroying herself in the vast airless depths of space.

In thirty years, the invincible Eqbas will arrive at Earth to forcibly return the planet to what it once was—as retribution, in part, for the gethes' thoughtless near-extermination of an alien ocean-dwelling species. First, however, another world requires their attention: the crowded, ecologically ravaged planet of the swarming, insect-like isenj. Efforts to drastically reduce the isenj population have sparked a devastating civil war—which may well do the savior/destroyers' work for them. And the human visitors can only watch.

Rendered immortal and ever changeable by a parasite in her blood, ex-cop Shan Frankland isn't content merely to play Matriarch to her two similarly infected mates—one earthborn, one alien wess'har. Her fears for the future of Umeh and the ultimate fate of humankind must be set aside while she tackles an unfulfilled duty that haunts her every waking moment—a mission that must be undertaken for the sake of the future—and pursues a righteous vengeance.

The worlds orbiting Cavanagh's Star are in turmoil.

Civil war on Umeh—ignited by outsiders—threatens to annihilate the teeming masses of a grossly overpopulated planet. On Bezer'ej, the handful of native aquatic creatures who survived extermination must take extraordinary and terrible steps to ensure the future of their kind . . .

And the interlopers from a distant planet called Earth can only watch the chaos they helped, in part, to create—knowing their home world will be next to suffer.

The day of reckoning is rapidly approaching when the powerful Eqbas will remake the Earth at the expense of its dominant species. And Shan Frankland—once a police officer, once human, now something much more—must decide where her loyalties truly lie: among the gethes, on a planet she once called home, or here, where a dying species presents her with a new and unexpected crisis.

The Eqbas have come, bringing justice, change, hope to some . . . and death to many.

Seeking to punish the human gethes who caused the near destruction of an ocean-dwelling race in the distant Cavanagh’s Star system, the Eqbas have finally landed on Earth. But another, equally important obligation has drawn them across the galaxy: the salvation of this environmentally ravaged world, a mission that could entail the annihilation of billions of humans.

Former police officer Shan Frankland has come as well—along with her two lifemates, one alien and one human—carrying in her blood the parasite that makes her virtually immortal. Though she once vowed never to let the powerful contagion reach the homeworld she left nearly a century ago, she feels compelled to play an active role in the unfolding drama—and to follow the catastrophic events that have devastated civilizations and defined her life to their shocking, inevitable end.