In less than nine days, terror crosses the border . . .

Hiking in Arizona, biochemist Emma Caldridge inadvertently interrupts the operations of dangerous traffickers in human cargo—and is chased south into the arms of millionaire drug merchants. Suddenly a prisoner of Mexico’s most feared cartel, Emma makes a shocking discovery in the marijuana fields outside Ciudad Juarez: plants rotting with a flesh-eating toxin that causes a truly horrible death within nine days of exposure. And there is no antidote.

The cartel believes that U.S. agents contaminated the plants, and, determined to make their enemy pay, they prepare to spread their lethal product across America. Emma Caldridge searches desperately for a cure, but time is running out more quickly than she anticipated. For Emma herself has been infected—and, barring a miracle, she will die before the terrible dawning of . . .