A border is a law drawn in the sand, and things are heating up fast between the United States and her southern neighbors. American girls are disappearing from the small Texas towns that form America's new frontline, the number of incidents involving dangerous illegals grows daily, and Mexican troops are making nightly incursions onto U.S. territory.When a mysterious explosion destroys Alex Hawke's research vessel, he is captured by insurgents and enslaved deep within the Amazonian jungle. Before he escapes, he learns that the inexplicable army is preparing for war - but against whom?When he regains contact with his American and British intelligence counterparts, Alex's worst fears are confirmed. The men in the jungle are highly trained Al Qaeda warriors - called Las Medianoches - who are planning an unspeakably violent jihad against America. While the United States focuses its efforts on the escalating border disputes with Mexico, Alex vows to put a stop to the deadly plot. Aware that his possibly doomed mission may be the country's only hope, he travels back into the jungle to destroy the lawless mastermind who dares to threaten America.