As the club deals with the aftermath of its illegal arms warehouse attack, the deputy chief of police poses a new threat to SAMCRO's reign over Charming; Jax continues to worry about his newborn son's fate; Opie faces a difficult decision.

When a prominent Charming family's young daughter is assaulted at a carnival, SAMCRO races against the authorities to capture the assailant; a new shipment of guns arrives from the group's IRA connection; Tara's ex-boyfriend arrives in Charming.

The club travels to Nevada to store arms with a brother club; when the Mayans pose a threat, Clay decides to "patch-over" the tribe, making them an official charter; Tara's ex, an ATF agent, investigates SAMCRO.

A small favor for Piney's old war buddy turns into a big problem for SAMCRO; Gemma deals with the effects of aging.

When old bones are discovered on the outskirts of Charming, Clay must deal with long-buried secrets; the club sets its sights on prize money in a bare-knuckle brawl; Kohn's investigation becomes personal when his true intentions are revealed.

SAMCRO plans retaliation on a rival biker club while dealing with wounded Cameron Hayes in the clubhouse; Jax, Bobby and Opie try to end the gun debt for good.

With Stahl pressing the women of SAMCRO, Jax sees Unser as the key to salvation; Cherry reveals interesting information about her past.

Jax's loyalty to SAMCRO is tested when one member is arrested and another disappears. Meanwhile, Abel's improving condition could spur his release from the NICU, but his homecoming may not be the only one.

Clay's solution to getting cash for Bobby's defense leaves SAMCRO in a vulnerable position; Abel's happy homecoming ends in turmoil for the club.

In the wake of a tragedy, the club must re-evaluate its bonds of brotherhood.

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.

Zobelle comes up with a problem that Hale can solve to frustrate SAMCRO. Meanwhile, Gemma being raped is really affecting 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.

While Jax and Clay lock horns (and line up support) over how to deal with Zobelle, Tara finds herself ensnared in Gemma's emotional struggle in the aftermath of her attack. Meanwhile, SAMCRO gets help from an unlikely source.

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.

Since The League has SAMCRO members behind bars, the club must make new alliances in prison to survive. Alcohol, Tobacco and Firearms Agent Stahl uses this imprisonment to test Jax and Clay's relationship.

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.

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.

While Opie seeks both revenge and reconciliation, Chibs makes a secret deal with Agent Stahl (Ally Walker) to protect his wife and daughter.

Jax and Clay keep SAMCRO focused on their impending showdown with Zobelle's group; thanks to Gemma, Tara improves her job security at the hospital; Weston finally discovers his boss's intentions in Charming.

The second season ends with SAMCRO trying to get rid of Ethan Zobelle (Adam Arkin) and his cohorts once and for all.

The aftermath of Abel’s kidnapping has the Sons reeling - especially Jax, whose grief sends him into deeper turmoil over his future with the MC. Framed for murder, Gemma remains on the lam, and is hit with some unexpected news from her past.