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

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

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