Donna's death has the club divided, with Clay setting up a new gun deal with the IRA. Charming and SAMCRO's hold on the city is threatened after Ethan Zobelle, a sophisticated separatist opens a tobacco shop. Zobelle and his less-sophisticated associate are determined to take SAMCRO down due to their black and Latino bikers.
After Gemma experiences something horrible she can't tell Jax and Clay. A rival porn producer comes to try and put Luanne out of business and Clay doesn't like Jax's decision making.
Zobelle comes up with a problem that Hale can solve to frustrate SAMCRO. Meanwhile, Gemma being raped is really effecting her relationship with Clay and the fact that Jax is involved with Luanne's porn business is bothering Tara. Clay decides to give Bobby the responsibility of running the business side of Luanne's.
SAMCRO leaves Charming to participate in a charity motorcycle club run, and with them gone, Gemma runs into more trouble with the League.
Gemma finds answers and becomes closer to Tara. Chief Unser tells Deputy Chief Hale the truth. The tension between the white supremacists and Sam Crowe is growing.
Zoebelle incites Clay, who plans a course of retaliation, causing Jax to look to an unlikely source to keep the club from being destroyed. Tara learns from Gemma how an old lady handles anger.
Now that The League has SAMCRO members in prison, the club must create new alliances while behind bars to survive.
Extreme measures are taken by SAMCRO to get a hold of weapons for a customer. A theft at Caracara Studios means revenge after one diva is put at risk. Tara's professional and personal lives begin to collide.
Because the adult-film business has become a hindrance to SAMCRO, Clay uses the opportunity to revive the gun-running cartel. Meanwhile, Jax and Clay continue battling over club activities.
Clay calls for a club vote to allow Jax to go nomad. The SOA get into a new line of business selling ammo along with guns. Agent Stahl goes after the IRA using Chibbs and the SOA. Gemma tells Jax and Clay about her assault. Tara gets suspended from the hospital.
The rest of the club finds out what happened to Gemma and plot their revenge on Zobelle and Weston. Opie learns the truth about Donna's hug from Tig and the club deals with the fallout. Opie goes after Agent Stahl for her role in Donna's death. Jax learns somethings about Zobelle and LOAN. Chibs comes clean with the club about his dealings with Agent Stahl.
SOA gathers the tribe for protection, preparing for the showdown with Zobelle and Weston. The club gets revenge on Weston, Agent Stahl and the IRA. Gemma and Tara talk religion, Tara gets her job back using her connections to the club. Tensions mount between Chief Unser and Deputy Chief Hale.
As SAMCRO attempts to rid Charming of Ethan Zobelle and The League permanently, familiar faces present new challenges.