In the second half of the twenty-fourth century, diplomatic relations proceed cautiously between thranx and humans, who are slow to overcome their aversion to the insectlike beings. But the lowly thranx are nearly forgotten with the sudden discovery of an ideal planet to colonize--Argus V--and the startling appearance of a new race of space-faring aliens. People are dazzled by the beautiful, glamorous pitar. Then tragedy strikes.

A cargo ship making a routine delivery to Argus V finds a scene of grisly carnage has replaced the bustling new world. The entire human population-- 600,000 men, women, and children--has been brutally slaughtered. Not one survivor or a single clue remains to identify the unseen executioners. Even the combined efforts of all alien species prove fruitless in the search for killers who have perpetrated planetary genocide on such a vast scale.

But from a tiny inner moon of Argus V comes a faint, wavering signal--and on that insignificant chunk of rubble lies the key to the crime. The cataclysm that follows is replete with shock and deadly consequences for thranx, pitar, and human alike. For their worlds will change forever by the colossal space battle that is both in their future and their destiny.