After Porter Gainsley's bombing of the Tumbleweed and attempt on Katherine's life, Lamb and Savino decide to team up to take out their common adversary once and for all. To prove his commitment to the task, Lamb hands over the tapes with the recordings from the bug in Savino's phone, and then the mobster and former sheriff get to planning their assault on Gainsley. Since the ranching mogul is too heavily protected at his home, they decide to target him at a livestock auction, but that plan goes awry when Dixon shows up and holds Gainsley at gunpoint. A firefight breaks out and Lamb is forced to save his son and flee, giving Gainsley time to regroup and amass more artillery for the coming war. When Jack is ousted as interim Sheriff by more of Gainsley's men, he and Dixon join forces with Lamb and Savino, and together they craft a plan that involves using Jones the hitman to put Gainsley in a corner. Jones plays his part well and leads Gainsley and his thugs into a trap, where Lamb gives him his freedom as a reward. After an intense firefight, Lamb gets the drop on Gainsley and decides to arrest him instead of killing him, setting the proper example for his son and staying true to his morals. In the end, Lamb gets his Sheriff job back, putting him at odds with Savino and his plans for growth in Vegas yet again.Meanwhile, Jack plans to propose to Mia, but his plans are derailed when she breaks up with him after finding out about the bug he planted in Savino's phone. Tommy pursues Mia even harder, and the two wind up spending the night together. After Gainsley is taken into custody, Jack goes to Mia's place to fight for her, but is crushed when he discovers Tommy there with her in nothing but a bath robe.