Terrorists had Chicago's Ogilvie Transportation Center and its 10,000 commuters seconds away from annihilation.  Their credibility established, the perps spare Ogilvie but threaten even more devastating consequences unless the FBI kills William T. Knoble, a local attorney with no known criminal ties.
 
On a timeline and desperate to understand why an obscure, small-time lawyer is the subject of a terrorist demand, the FBI turns to Ben Siebert, a former Marine who two years earlier used highly unconventional tactics to save America from a devastating cyber attack.  Siebert resists at first, reluctant to get involved.  But when the terrorists kidnap and threaten his son's life if Knoble isn't dead in a week, he is forced to find out just how far he's willing to go to protect his family.
 
After abducting Knoble to keep his options open, Siebert is a fugitive of the law with a sole objective.  In pursuit of his son, Siebert applies years of military training to attack the problem with ruthless and unapologetic determination.  But nothing is as it seems, and as Siebert winds through a maze of high-stakes deception and treachery, he learns that his son and Knoble are not the only ones in jeopardy...millions of people's lives depend on his mission.