Jax and Chibs hide out at Nero's escort offices while planning their next move. Tig and the club scour Oakland for Fawn. Clay makes a move that surprises Bobby and Opie. In the midst of chaos, Jax and Tara have an abrupt wedding ceremony. Nero begins to develop an alliance with Jax and a relationship with Gemma.
As Jax, Chibs, Tig, and Opie struggle to stay alive during their time in County jail, Bobby finds out from Luis that the cartel is looking to secure a backup plan. Gemma turns to an unlikely source as Tara continues to maneuver Thomas and Abel away from her. Meanwhile, Clay uses Nero's escort services to get a rise out of Gemma. Damon Pope gives Jax his terms and conditions, which could effectively change the entire dynamic of SAMCRO. Opie is killed so the other members can be released.
The police raid on Nero's brothel leaves Nero and Carla without an office space. Meanwhile, Jax and Chibs try to protect the escort the Byz Lats believe is responsible. Wendy tries to come to honest terms with Tara while Gemma makes a move to get Tara back on her side. Opie's wake is held, with all of SAMCRO in attendance.
The club votes on getting into the companion business with Nero. Meanwhile, Jax begins to build bridges by getting Jacob Hale's Charming Heights development back on track. The Gallindo/Irish Kings meeting finally happens. Gemma confronts her son over her relationship with Nero. Roosevelt's wife shoots herself while she is pushed to the floor during a home invasion. A transvestite hooker does a favor for SAMCRO.
SAMCRO's drug hauling arrangement with Damon Pope and the Cartel takes a riskier, more profitable turn; bringing the Niners, Lin's Triad and the Mayans together in an uneasy pact. Back at Charming hospital, Rita Roosevelt dies of wounds sustained thanks to the home invasion. Jax learns the identity of the County Jail officer who led Opie to his death and takes bloody revenge. Tara tries, but fails, to convince Otto Delaney to reverse his testimony against the club.
The club begins to connect the dots on the series of home invasions. The nomads are believed to be somehow involved and sheriff Roosevelt knows the club brought on the attacks, although Jax had nothing to do with it. Clay is behind the attacks and sends the nomads to kill Unser who is getting close to the truth, but double crosses them, thwarting the attack on Unser, killing two of the Nomads, one remains at large. Gemma falls asleep at the wheel and is involved in a car accident while taking Jax's kids home. The accident appears to have one fatality. At the same time Jax and Chibs are run off the road by two masked men in a van, Jax shoots one and they unmask him; he is black.
In the aftermath of Gemma's car accident, Clay and Nero have different approaches on how to help her out of trouble with Jax and Tara. The Sons try to find out who was behind the attack on Jax and Chibs. Meanwhile, Roosevelt promises to give Jax the member of the club that has been informing on them for the RICO case in exchange for Frankie Diamonds. Juice finally lets someone in on all of the secrets that he's been hiding from the club. And Jax devises a plan trap Clay, which involves manipulating his mother.
Jax and the club go on the hunt for Frankie Diamonds, while Clay and Juice follow up on their own leads in an attempt to get to him first. Gemma and Nero share a tender moment as he buries his sister. Tara gets more than she bargained for as she makes a second attempt to get Otto to recant his story. Roosevelt and Jax's deal comes to a head, but neither is too thrilled with the results.
After confronting Juice about his betrayal of the club, Jax offers him a path to redemption. Avenging Opie's death proves difficult when one of the perpetrators turns up under the protection of the Grim Bastards, leading to a disagreement between Jax and Bobby. As Gemma attempts to get closer to Clay, Tara performs one last favor for Otto—with bloody results.