A band of marauding bikers crashes the annual Banshee Spirit Festival, with deadly consequences, sparking Lucas and Siobhan to meter out vigilante justice. Burned after losing his key witness against Proctor, Lucas is further dismayed when FBI agent Xavier arrives to monitor the situation. Rebecca Bowman, torn between passion and her Amish roots, finds a kindred spirit in the sheriff.

Lucas’ cover is threatened when Carrie decides to give him over to Rabbit in an effort to protect herself and her family. Meanwhile, a drugstore robbery turns into a full-blown hostage crisis at the high school, with Deva and Mayor Kendall’s wife Janie among those whose lives are imperiled.

Carrie urges Lucas to let go of the past, even as an increasingly suspicious Gordon is hell-bent on uncovering hers. Cast out of her Amish home, Rebecca turns to Proctor to give her a new start in Banshee. A surprise visit from Rabbit’s lieutenant, Olek, a.k.a. Widow’s Peak, brings back a flood of memories for Carrie. As his family keeps vigil for the ailing Benjamin Longshadow, Alex gets a surprise visit from his sister Nola.

As Rabbit closes in on Carrie and Lucas, Carrie flees the hospital in a desperate attempt to collect her family and get them out of town. Kai introduces Rebecca to the business world, and sends Lucas a message about fooling around with his niece. Alex Longshadow recruits a Proctor thug with gambling issues to deal with a work-stoppage problem at the casino.

Recalling a series of prison therapy sessions that fueled his hatred of Rabbit, and pressed by Xavier’s insistence that the FBI handle a kidnapping case, Lucas makes a decision that will change the collective fate of Carrie, her family, Sugar, Job, and the entire Banshee police force. A special delivery at Alex’s doorstep leads Nola to reconsider her future; Kai teaches Rebecca the power of telecommunications.

In the aftermath of their bloody shootout with Rabbit, Lucas, Carrie and the Banshee Sheriff's Department (BSD) are interrogated by FBI special agent Jim Racine, who metes out punishment that may, or may not, fit the crimes. Meanwhile, Proctor sets his sights on persuading Rebecca to return to his care. As Gordon stews over his wife's betrayal, Deva shows off her resourcefulness after being caught shoplifting in a mall. Later, a straightforward armored-truck robbery turns into a dangerous high-speed chase involving a mysterious motorcycle pursuer.