Gemma hosts a fundraiser, bringing back a familiar but not welcome face who has history with SAMCRO.

When Oswald puts up the bail money, SAMCRO are released from prison, but the split between Clay and Jax is wider than ever. Complicating matters, Caruso's thugs attack Luann's studio. In an effort to heal the tensions between her husband and son, Gemma organises a meal. Clay comes to an agreement with Oswald when he learns Jacob is planning to run for mayor. Chibs's estranged wife Fiona Larkin (Bellina Logan) shows up at his hospital bedside, much to Gemma's chagrin. Lin has a proposal for SAMCRO, who are surprised to learn Marstein is still alive. Given the accounting job at Luann's studio, he informs SAMCRO that the Triad and the 9ers have been losing territory to the Mayans. When Jax, Bobby, and Opie go to see Laroy to ask him about it, they get something unexpected. Meanwhile, Weston is not entirely happy with Zobelle's latest decision, Gemma's efforts to help Tara backfire, Opie begins to get close to one of Luann's girls, Lyla Dvorak (Winter Ave Zoli), and Edmond begins a relationship with Zobelle's daughter Polly (Sarah Jones).

When SAMCRO's adult film business becomes a hindrance to the club, Clay seizes the opportunity to revive the gun-running cartel. As Jax and Clay continue to clash over club activities, their relationship reaches a new level of antagonism.

The entire SAMCRO family goes on lockdown inside the clubhouse as war with the League approaches. Opie decides not to pursue revenge against Clay or Tig for Donna's death. Jimmy puts an end to Cameron's deal with Zobelle, agreeing instead to sell exclusively to SAMCRO. As Chibs backs out of the deal with Stahl and attempts to convince Fiona to let him protect her, Clay tells Jimmy that Edmond has flipped. After Jax witnesses Zobelle meeting Álvarez, SAMCRO inform Weston of the real nature of Zobelle's business dealings. Tara applies the lessons she has learned from Gemma to assert her position at St. Thomas. SAMCRO approach Laroy and Lin about uniting against their common enemies; the League and the Mayans. Edmond re-negotiates his deal with Stahl, seeking immunity for himself and Cameron. Hale makes a decision about what kind of chief he wants to be.

The club exploits its porn connections to entertain Henry Lin's clients, which doesn't sit well with one member.

Jax brings a new proposal to the club with serious consequences.

Jax scrambles to put his affairs in order, while Nero handles business with his old crew.

Jax makes arrangements to take the club in a different direction.

Jax looks to push the club forward but the Irish put another obstacle in his way.

Jax has to handle some unhappy customers as the weapon deal goes through Mike's organization. Meanwhile, Tara finds a way to avoid jail without giving up the MC.

Jax is freed from prison and makes revenge his top priority. Wendy leaves rehab early and discovers Juice is hiding from SAMCRO and laying low at her apartment.

Jax calls in the Nevada charter for help in dealing a huge blow to Henry Lin and his crew. Unser digs into Tara's murder.

Jax looks to draw out the snitch that sold him out to Lin, leading to a confrontation at the port. Juice leaves town with Gemma and discovers her true intentions.

As the whole of the Sons of Anarchy organization bears down on the outlaw motorcycle club's California-based Redwood Original chapter, President Jackson "Jax" Teller comes face to face with an extremely unpleasant reality.