After discovering an addendum on the Louisiana Purchase receipt, Curtis and his team must race against old enemies and friends to maintain control of the Louisiana Purchase territory.
Tensions between Sweeney and Roarke erupt when one of the Westies is busted; Keenan uses the case to pressure Sweeney and earn Polk's trust; Flanagan's personal life unravels; Bridget pushes deeper into her mission as Cahill's motives blur.