Gunslinging U.S. Marshal Raylan Givens faces off against his oldest friend in Harlan, Kentucky, a 21st Century Wild West.

Raylan hunts an escaped prisoner who is determined to reunite with his ex-wife...and his stashed fortune.

The Crowder and the Bennett clans go to war over control of Harlan, a move that leaves dead and dying on both sides.

The arrival of a Detroit mobster in Lexington puts Raylan on a collision course with a sadistic Dixie Mafia hit man. Raylan also has another altercation with Boyd.

Raylan investigates a burglary that's uncovered a diplomatic courier's bag hidden in his imprisoned father's house, while a new preacher's ministry cuts into Boyd's 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.

Raylan guides Ava through the process of informing on Boyd and tries to turn Boyd's old ally Dewey Crowe against him as well, all while Boyd works to pull off a daring heist right under Raylan's nose.