As the NSA trails their every move, Taylah and Ed race to track down the final piece of the puzzle.

As Ed and Taylah try to expose the truth, a deadly threat is discovered to be closer than they could have imagined.

Ed and Taylah join Andrea in Baghdad, where they unearth ancient, buried answers—and get caught in the crosshairs of an unknown enemy.

Ed is coerced into completing his work. Taylah considers an ultimatum. An ally gets trapped in the middle of the mayhem.

Ed digs deeper for clues at the institute. Andrea navigates devastating news in Baghdad. Taylah reconnects with leadership.

Cambridge student Edward Brooks starts working on a secret research project that triggers unthinkable chaos.

While retracing Safiya's steps, Ed uncovers chilling pleas from the past. Taylah tries to earn Ed's trust.

Ed's work catches the attention of NSA operative Taylah Sanders and a mysterious institute.