A daring assassination attempt leaves FBI Agent Matt Higgins's closest friend bleeding out in an alley. Seeking justice, he embarks on a global search to identify the mastermind behind the attack.

But Matt's decorated career has left him with many enemies and plenty of suspects—from the Grand Ayatollah to the steps of the Vatican. And bringing those responsible to justice will force Matt to choose between the country he's sacrificed everything for and his thirst for revenge.