Our time is almost up.
As the clock ticks closer and closer to the final Partial expiration date, humans and Partials stand on the brink of war. Caught in the middle, thousands of miles apart, are Samm and Kira: Samm, who is trapped on the far side of the continent beyond the vast toxic wasteland of the American Midwest; and Kira, now in the hands of Dr. Morgan, who is hell-bent on saving what's left of the Partials, even if she has to destroy Kira to do it.
The only hope lies in the hands of the scattered people of both races who seek a way to prevent the rapidly escalating conflict. But in their midst appears a mysterious figure, neither human nor Partial, with solemn warnings of a new apocalypse—one that none of them may be able to avert.
The final installment in the Partials Sequence is a thrill ride of epic proportions, as the last remnants of life on our planet fight to determine its final fate. (Google Books Summary)