Emily is forced to deal with another devastating loss. However, her grief soon transforms into drive when she realises Rex Wolfe was only the tip of the iceberg.

Emily is serving out the final days of her FBI suspension while struggling to come to terms with the consequences of her actions from the last two seasons. Hyper-vigilant and distrusting of others, Emily sees threats everywhere and takes a closer look at everyone.

Emily’s demand for the FBI to go after Nick is met with resistance, which leads her to set in motion a risky plan that puts her face-to-face with the one man who can lead her to Nick. Meanwhile somewhere in Europe, Nick is being drugged and psychologically tortured, revealing his buried guilt and his insecurities as an FBI agent, a husband, and as a father.

Emily makes a final attempt to trade the stolen files for Nick and demands proof that he is alive, unaware that Nick has escaped from his captors in a thrilling chase. Nick makes contact with the FBI, and Emily makes a bold decision to confront Cal about his past.

Emily and Nick devise a plan to infiltrate the refugee camp, and Cal poses as a Meridian guard in hopes of finding Armstrong and bringing him to justice. Meanwhile, Crown and Gunnarsen narrow in on Meridian’s mole and an unexpected visitor arrives at the farm.

Nick works to free the refugees and Cal finally confronts Armstrong. When Gunnarsen and Crown go to arrest Deputy Director Webb, they discover something deadly. Meanwhile, Emily tries to get to the bottom of Elliot’s operation and goes to extreme lengths to protect her family.