The search for a missing government informant pits Raylan against both the Crowder and Crowe clans, while a standoff with Cousin Johnny reveals a powerful rival to Boyd's drug business. An investigation into mobster Nicky Augustine's death threatens to implicate Raylan.
As Art's frustration with Raylan boils over, the Crowe family battles both the U.S. Marshals and the Crowders to stay in Harlan. Boyd enlists unlikely allies to insure Ava's safety in prison and to regain control of the local drug trade.
As Raylan investigates the Crowe crime family's role in the disappearance of a corrupt Florida Coast Guard officer, Boyd revives a failed drug deal to help keep Ava's murder case from going to trial.
As Raylan divides the Crowe family to bring Darryl, Jr. to justice, Boyd faces off against a drug cartel's assassins. Ava confronts her enemies as she looks for a way out of prison.
With their heroin deal unravelling and threatening to divide the Crowe clan, Ava delivers bad news to Boyd as she faces a deadly juncture in the launch of her drug smuggling ring.