As Kim’s campaign for a car coincides with the need to take Grandaddy Clisby’s keys away, Bill proposes a solution that is only pleasing to him: Kim can drive, so long as she takes her grandfather and Dean around town. Later on at the mall, Dean is worried about seeming uncool when Clisby ends up chaperoning him and his friends, but Clisby has a few crowd-pleasing tricks up his sleeve.

When Dean comes down with the chicken pox on his way to a hunting trip with Bill and Grandaddy Clisby, Lillian forces the three of them to quarantine together. Clisby pushes homemade remedies on them out of his mistrust of doctors, but he’s forced to reckon with this when Dean’s condition worsens.

It's the end of the school year, and summer excitement is all around; Bill and Lillian each receive major career opportunities; Dean and Keisa take shelter together as a tornado tears through.

When Lillian joins the church choir, she discovers a new side to her mother-in-law; Kim encourages a guilt-ridden Dean to have an encounter with the supernatural.

In search of a new hobby, Dean joins the drama club - only to find himself mixed up in drama of his own. Bill and Kim grapple with Bruce's choice to campaign for a local politician.

The Williams gather to celebrate Clisby's 75th birthday - including Bill's brother Melvin and his daughter Cassie. While Bill and Melvin try to one-up each other for Clisby's approval, Cassie shares big news with Lillian and Kim.