The surviving Méridiens have returned to Confederation space, aided by their recently discovered cousins, the New Terrans. They expect a celebration after their 71-year absence. Instead, they're shocked to find the silver ships have destroyed half the Confederation. The Méridiens are fleeing in advance of the horde of alien ships. But Alex Racine and his crew didn't come this far to run away from humanity's enemy.

The Méridiens are fleeing to their far colonies - and they have reason to run. Over the course of decades, they have lost hundreds of ships, billions of people, and seven Confederation colonies to an alien enemy: an advancing swarm of silver ships transported in the bowels of a gigantic, spherical vessel. Alex Racine, who once enjoyed the solitary life of an explorer-tug captain, is now an admiral and responsible for the lives of a quarter million Librans.

Until the Confederation created Allora, it had produced SADEs (self-aware digital entities) for hundreds of years with enormous consistency and harnessed their capabilities to power the society. But this particular young SADE was disturbed by her confinement. Trapped in metal-alloy housing on the bridge of a luxury passenger liner, Allora sought to possess the same freedom enjoyed by humans, who came and went from her starship with abandon.

Trouble infiltrated the Harakens' capital city of Espero, in the form of New Terra criminal gangs who grew wealthy and powerful on the moons of Ganymede, hiding behind the cover of an ill-conceived mining charter. The gangs brought stims and addictive hallucinogenic drugs to Espero, distributing them to the young on the planet.

What should have been a routine survey mission became a disaster. To the Harakens' surprise, they discovered, not one but two alien species, which were constantly engaged in conflict. One species, the Dischnya, hid their nests underground, and each nest owed its allegiance to a queen. On the grassy plains, where the Dischnya lived, the resources were scarce, and the warriors competed fiercely.