Lucas, Brock & Siobhan exact payback on a skinhead responsible for Emmett's death. Carrie faces new challenges in the wake of her revelation to Gordon and Deva about her past. Investigating the murder of four Marines, Lucas eyes the chance of a huge if dangerous heist.

As Lucas and Carrie case the tunnels under Camp Genoa, Proctor and Rebecca find themselves in a territorial faceoff with two rival drug suppliers. Carrie tries to end a relationship with Colonel Douglas Stowe, who may be misrepresenting the amount of cash in Camp Genoa.

Lucas' secret is threatened when he's arrested by FBI Special Agent Robert Phillips, but both men end up at the mercy of Raymond Brantley, a mob kingpin with a deadly mobile agenda. Against Chayton's orders, Tommy Littlestone spearheads a second strike against Proctor.

Siobhan is torn between exposing Lucas and keeping his secret. Job and Sugar mop up critical surveillance. Carrie takes off on a thrill ride after walking out on her job while Gordon changes his mind about Proctor's plea bargain. Chayton readies his army for an assault.

All hell breaks loose as Chayton and an army of Redbones invade Banshee, looking to avenge Tommy's death at the hands of Raven, the Kinaho tribesman-turned-deputy. As the assault reaches a fever pitch, Bunker tries to prove to Medding he's not the man he used to be.

Reduced to the status of "observer" as the FBI plans a raid on the Redbone wilderness compound, Lucas decides to take matters into his own hands. Still stung by Proctor's rebuke, Rebecca is further chagrined to learn of her uncle's burgeoning romance with Emily.

Despite Job's reservations, Lucas and his team pull off a daring heist at Camp Genoa. Lucas and Chayton are haunted by their recent deadly encounter. Unbeknownst to her uncle, Rebecca heads to Philly to work out a deal with a spurned Proctor client.

Lucas and Brock head to Louisiana, and the infamous Underground fight club, in search of Chayton. Stowe pieces together details about the Camp Genoa heist. Sugar looks to repay an old boxing debt, while Rebecca's initiatives put Proctor and Emily in harm's way.

Lucas recalls the history of his friendship with Job, while pondering the future – if there indeed will be one. Proctor and Emily pay the price for Rebecca's recklessness. Carrie and Gordon pick up the pieces of their relationship, while Stowe and Leo land a big fish.

Lucas prepares to return to Genoa for a final negotiation with Stowe. Joined by Rebecca and a new ally, Proctor heads to Philly to settle a score with Frazier and the Black Beards. After a bloody denouement in Banshee, Brock finally gets what he's been wishing for.