Spain 1057: During a thunderous battle, the first King of Aragon wrestles Alexander the Great’s priceless Egyptian weapon from the Moors, but finds it holds a terrifying and mysterious power.

Nearly a thousand years later, on a fog-shrouded Napa Valley morning, gunshots and the clatter of breaking glass rip through the silence. Maddy Marshall, an app designer with special martial-arts abilities, and her twin brother, Will Argones, quickly run toward the sound. Horrified, they discover a sniper has cut down two members of their family.

Before the pool of blood on the living room floor is dry, their father sends the twins on a dangerous quest to recover Alexander’s ancient weapon. Joined by a broad-shouldered friend who harbors a secret alliance with VanOps, an ultra-black covert agency, they soon discover the lethal sniper is from Russia.

They follow time-worn clues from a medieval Spanish castle to a lost warren under the streets of Jerusalem, racing to unlock the secrets that will lead them to an arcane power–before a hostile state seizes the power and cripples the United States.

To survive, they must go undercover and off-grid. No place is safe, a wrong move means death, and even a simple phone call is off limits. Because now, the sniper has his sights set on them.