A mob revenge plot descends upon Kentucky; Boyd's recent successes are tempered by a crushing defeat.
A shooting close to home forces Raylan and Boyd to decide which lines they're willing to cross; Boyd tries to make a new deal with Wynn.
Boyd and the Crowes fly south for a crucial drug score; Raylan pursues a small time grifter with big time enemies.
Raylan has one last shot at taking down Art's would-be assassin; cartel killers have Boyd's back against the wall.
An attack on Alison sends Raylan to Harlan in search of payback; Boyd scrambles to arrange protection for Ava.