The 30-year-old Jax finds himself torn between his role as a new father and his involvement in SAMCRO, a biker gang that his father helped to found.
SAMCRO faces a new threat in the form of a white separatist group that challenges the club for dominance of Charming. Meanwhile, the conflict between Jax and Clay puts SAMCRO in even more danger as the stability of the club is brought into question.
AS Agent Stahl returns to try and drive a wedge between the club members, Abel is kidnapped, leaving Jax and Gemma scrambling to save him. Donna's death comes back to haunt the members of SAMCRO.
After a 14-month stint in prison, the club members are released to face a brand new world, between a new lawman who isn't willing to allow them back in control, and an old face who has risen to power.
A war for vengeance erupts between SAMCRO and the Niners, leaving Jax in a tight spot as he seeks to broker for peace with Oakland kingpin Damon Pope before his club members get eliminated.
The club's existence is put on the line as Toric tries to use the incacrcerated Tara and Clay against SAMCRO, leaving the latter to make a difficult decision when faced with the threat of death.
The motorcycle club Sons of Anarchy experience new upheavals as Tara's death makes revenge Jax's top priority and encourages him to bring forth more alliances against Henry Lin, all while the club goes through internal break and external conflict with the organization.