At the explosive center of the action, Western-style, gun-slinging U.S. Marshal Raylan Givens confronts murder, drugs, bank heists, mobsters, crime families, corrupt politicians and even his own tumultuous past and never backs down. His ultimate adversary is the cunning, complex outlaw Boyd Crowder, but the real wild card is Ava Crowder, the mysterious woman torn between the two men and both sides of the law.
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.
Raylan's investigation brings him into conflict with a paramilitary outfit, while Boyd and his partners try to salvage a profit from their heist.
Raylan follows a trail of illegal explosives in an attempt to pin Boyd, who discovers he's run afoul of a dangerous new player in town.
Raylan declares war on the deadly men who are forcing Harlan's most valuable real estate to change hands, while Boyd and Duffy seek out a crackpot safecracker to help do their dirty work.
When Ava makes a drastic decision, Raylan turns to an old friend for help. A suspicious Duffy looks into Ava’s release from prison.
Raylan investigates a murder that has sown discord in Markham's camp. Boyd's latest heist forces him to revisit his mining days.
A visit from his baby daughter threatens to pull Raylan away from the hunt for a dangerous fugitive. Boyd, having learned that Ava's been lying to him, takes her on a hunting trip that she may never come back from.
Raylan extends an unexpected offer to Markham. Boyd and Ava find themselves in Walker’s dangerous company.
Raylan and Boyd each test Ava's loyalty, and Markham's plans to win over Harlan go awry.
As Raylan puts more pressure on his CIs, Boyd makes a move on Markham’s money, and Ava finds herself caught in the crossfire again.
Raylan and the Marshals scramble to deal with a crisis that threatens all of their careers. Duffy, Mike, and Katherine question the meaning of loyalty.
Raylan and Boyd’s paths cross as they search for Ava in the mountains. Markham recruits an unlikely ally to his cause.