Maddox Beck, an eco-terrorist, steals an ancient clay painting from his wife to map out the location of a dormant pneumonic plague virus. Beck successfully recovers the virus and weaponizes it to inoculate his followers and create a world-wide epidemic. The Task Force contains most of the followers, but Samar and Elizabeth are infected by one of them at Dulles International Airport. With Aram's help, Reddington learns Beck's location and steals a supply of synthesized vaccine, as well as a necklace and a key, before leaving Beck to commit suicide. The vaccine is delivered to the Task Force for distribution to infected agents and civilians. Meanwhile, Reddington, now knowing who is believed to be Jennifer (Scottie Thompson)'s whereabouts and identity, covertly watches her from a distance. Having failed to convince Reddington to remove the guard he assigned to her, Elizabeth pays a look-alike to distract the guard while she secretly visits a basement at an undisclosed location.