Still recovering from his gunshot, Raylan takes himself off of desk duty when one of Wynn Duffy's associates is involved in a murder. Meanwhile, Ava takes over Boyd's business while he is back in jail.
While the marshals try to figure out who killed a witness security officer and why, Boyd finds a way to get a message to Dickie Bennett in prison.
While tracking down a familiar enemy, Raylan crosses paths with a pawn shop owner with connections with the Dixie Mafia, while Boyd and his new crew begin setting up shop in Harlan.
A prison guard springs Dickie and Dewey from prison in an attempt to get his hands on Mags' secret fortune, while Robert Quarles offers Devil a shot at becoming a boss if he betrays Boyd.
After the plan to steal Mags' money fails, Dewey finds him himself in a life or death situation in a last-ditch attempt to make money. Meanwhile, after Devil's attempted betrayal, Boyd decides to retaliate on his enemies.
Raylan tries to find Winona after she leaves him, Boyd tries to find out who hit his crew's oxy clinic, and Quarles takes an interest in Raylan after he finds out that he has been asking questions about him.
As Quarles prepares to corner the oxy market in Harlan, he gets a visit from the boss' son. Meanwhile, Raylan's interest in the enterprise gets him in trouble with the FBI.
Quarles and Duffy kill Gary Hawkins and try to frame Raylan for his death, while also getting the FBI on his tail. Meanwhile, Quarles raises the stakes in his war with Boyd Crowder, and Ellstin Limehouse tries to decide whose side he's on.
Raylan tracks down Tanner Dodd, the Quarles associate who helped frame Boyd for planting a bomb in sheriff Napier's car. Meanwhile, Ava helps a prostitute who needs protection from Delroy after a robbery goes bad.
Raylan tries to make sure that Dickie Bennett isn't released from prison, while Boyd works to fix the election and get rid of sheriff Napier and Robert Quarles for good.
Dickie Bennett sets out to find the money Ellstin Limehouse stole from him, Robert Quarles takes a shot at Boyd Crowder's protection business, and Raylan has a run-in with a couple of hitmen from Detroit after Quarles threatens him.
Limehouse launches a plan in motion that will get rid of all his enemies once and for all, but will anyone take the bait? Meanwhile, Wynn Duffy works on getting Robert Quarles delivered back–dead or alive–to the Detroit mob.
While Quarles winds up on the run from the marshals after killing a state trooper, Limehouse uses an inside source to get Boyd in trouble with the law.