Raylan foils an attempt on Ava's life and vows to find out who was behind it. Later, Raylan finds out that Ava may not have been the target.

When a murderous inmate takes hostages, Raylan must scramble to defuse the situation before the bullets start flying.

When Boyd Crowder and his crusaders become vigilantes, Raylan takes it upon himself to try to shut them down.

In order to work for the Marshal's Office, Raylan's dad Arlo agrees to become a double agent and work for Bo Crowder. Meanwhile, Bo sets up a meth lab to get back in business.

In the season finale, things come to a head in Harlan when the worlds of Raylan, Boyd and Bo Crowder collide.