The 8-episode series follows two best friends, Judith (Hannah Waddingham) and Debbie (OctaviaSpencer), who know everything about each other—except, unbeknownst to Debbie, Judith has been livinga double life as a highly trained assassin. When a hit goes horribly wrong, the pair must go on the runtogether and work to repair their broken friendship—all while being targeted by a mysterious enemy whowants them dead.