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

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

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

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

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

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

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

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