Kate becomes upset when she learns that Luke is teaching an attractive (and unattached) young woman how to bowl, but at Grandpa's urging she turns the tables by convincing a handsome younger man to provide her with bowling lessons of her own.
Little Luke is highly resistant to the idea of taking tall and awkward Agnes Maypole to a school party, but when Grandpa finds the girl to be kind and considerate he becomes equally determined to compel the boy to honor his commitment to go ahead with the date.
Harm befalls members of the McCoy clan when sharing a task with Cousin Orval so, when Orval visits the McCoy farm, Grandpa and Luke hastily develop excuses to avoid chores involving Orval despite Kate's fragile skepticism.
When 16-year-old Hassie and her boyfriend Jerry impetuously announce their engagement, Grandpa's apparent approval causes considerable consternation among Luke, Kate, and Jerry's fastidious grandfather, J. Luther Medwick.
Luke and Kate attend night school. Luke accuses Kate of thinking she is smarter than him. The two have an argument, and stop speaking to each other. In order to save their marriage, Grandpa tries to get Kate to quit studying.
An eccentric area hermit furtively exchanges miscellaneous items for his subsistence but, when he trades for McCoy assets, Amos has him arrested for theft but is regretful when a hearing to put the man under state supervision ensues.
When the gossip-monger postman , who has witnessed George McMichael's will, lets it slip that Luke's family benefits substantially, Luke, Kate and the children engage in excessively fawning behavior toward George to the disgust of Amos.