Deputy Marshal Raylan Givens is exiled to his hometown in Kentucky after the shooting of a Miami drug cartel hitman raises debate over Givens' renegade style of law enforcement. It isn't long before the people he left behind begin to surface in the most unexpected ways.

In the aftermath of the deadly showdown that freed Harlan County from the Crowder family crime reign, Raylan takes on even greater criminal forces looking to seize power, including hell-bent nemesis Boyd Crowder and brutal new adversary Mags Bennett.

Surrounded by dirty politicians, drug cartels, murder frames, hidden fortunes and multiple criminal forces warring for control, Raylan finds himself in everyone's crosshairs.

Raylan unravels a mystery that echoes all the way back to his boyhood and his father's bad dealings, while Boyd finds his criminal grip on Harlan County loosening.

Raylan harbors a secret that could threaten his career and put the rest of the Marshals in jeopardy. Meanwhile, the brutal Crowe family reemerges, and Boyd desperately tries to protect Ava and gain control of Harlan's heroin market.

Raylan is torn by how far he will go to bring Boyd down—including using Ava as his secret informant. Additionally, both Raylan and Boyd must contend with a drug lord intent on building his own empire in Harlan.