Nas and Weller navigate their new dynamic as co-leaders during the team's hunt for a museum gala assassin, who turns out to be harboring a dark secret; Jane starts to see a softer side of her old organization.

A fugitive whistle-blower is sought by Weller and Nas in Bulgaria. Meanwhile, Jane joins Roman for a Sandstorm mission; and Reade and Zapata tend to a pressing matter.