As Chapel follows a disappearing money trail from Paris to Munich to the deserts of Saudi Arabia, Sarah uses her elite training to stalk the “shadow” and his elusive network. Meanwhile, their quarry is auditing their every move, laying a twisting trail of false clues and shocking surprises. With the clock ticking down, soon Chapel and Sarah have only days, hours, minutes to avert disaster as a master terrorist plots to unleash the first strike in a brilliantly orchestrated conspiracy--with an almost unimaginable goal.