On the road, on a hot Arizona night, Dylan O'Conner is overpowered by a stranger who injects him with an unknown substance.
All he's told is that he's the "carrier," not of a disease, but of something wondrous that will transform his life in remarkable ways - if it doesn't kill him in the next twenty-four hours.
Now Dylan, his autistic brother, Shep, and another "carrier," a young woman, are swept into a desperate search for the shattering truth of what they are and what they might become.
But first they must elude those sent to destroy them.