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.

Emily and Nick are finally reunited with Flynn back in Boston, but the threat of Elliot’s bioweapon still looms large. Emily resorts to drastic measures and make a dangerous choice to ensure her family’s safety.