Something bad has happened in Nevada. No one knows what it is for sure. Rumors fly about plagues and secret government experiments. And the President isn't talking.

In Serenity, New Mexico, Deputy Sheriff Jubal Slate has his hands full. It seems that half the town, including his mother and his boss, are sick from an unusual malady. Even more worrisome is the oddly-colored dawn sky.

Then a stranger crashes through town, a woman with a nightmarish story about what really happened in the Nevada desert. Soon, the townspeople of Serenity start dying.

And they won't stay dead.