A rival gang steals the Sons' stockpile of assault rifles, while Jax's ex-wife's drug overdose leads to an emergency c-section and life-threatening surgery for their baby.

The club deals with the aftermath of their firearms warehouse attack as a new Deputy Chief of Police poses a new threat to SAMCRO.

SAMCRO travel to Nevada to store their firearms with a fellow MC. Meanwhile the Mayans pose to be another threat.

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

With Clay in custody Jax has to step up as Piney's old friend turns out to be a problem for the MC.

Samcro scrambles to raise cash as the IRA gun payment comes due. The Mayans and Nords take an extreme step to cement their alliance. And Jax finds himself in danger as his relationship with Tara deepens.

As ATF agent Stahl pressures the women of SAMCRO, Jax looks to Chief Unser as the key to the club's freedom. Tara can't escape nightmares about Kohn. And Cherry reveals secrets about her past to Gemma.

The club needs cash to fund Bobby's defense, but Clay's strategy leaves them in a vulnerable position. Abel comes home for the first time. But the homecoming party ends in tragedy.

Jax's decision without the club's approval doesn't sit well with Clay, especially when it brings dangerous repercussions upon the MC.

The League takes bold new steps in their quest to undermine Samcro, forcing the club to take explosive measures.

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).