All of Mayberry turns out to welcome a truck carrying gold to Fort Knox as it passes through town. When Barney sneaks a closer look at the loot, he sees that there may not be as much to celebrate as everyone thought.

Opie finally gets a good grade in math, and Andy is so proud he tells everyone in town. But when Opie's teacher tells him she made a mistake and his grade is actually an F, he goes home to tell Andy the bad news, only to find Andy has bought him a shiny new bicycle.

Barney has an argument with his landlady Mrs. Mendelbright and gets evicted. After moving into the courthouse and having no luck finding a new place, he decides to mend fences with Mrs. Mendelbright, only to find she has decided to sell the house and run away to get married.

Andy decides to take a vacation in the mountains and leaves Barney to guard a prisoner the state police have brought in. Inevitably, the prisoner escapes Barney's grasp and flees into the mountains -- the very same mountains Andy is vacationing in.

After Andy extinguishes a small fire that started at the filling station while Gomer was napping, Gomer believes Andy saved his life and makes a pest of himself trying to repay the debt. Andy decides to stage an accident and let Gomer "rescue" him, but it's Gomer that ends up needing the rescuing.

Aunt Bee decides to buy 150 pounds of beef at a discount from a new butcher in town. She stores in in her "discount" freezer, which immediately breaks down. With her beef about to go bad, she learns that the only one in town with a freezer bug enough to save her beef is her original butcher.

Charlene Darling returns to Mayberry and announces that she has divorced her husband and now, according to folklore, must marry Andy. Desperate for a way out, Andy reads up on mountain folklore and finds a peculiar ritual that will void the marriage, if only he can get Barney to ride the horse.

When Opie and his friends are scammed into selling a useless skin ointment, Barney and Gomer try to help convince the company their product is more valuable than they think. When the scheme backfires, however, the whole gang learns a lesson in the art of the deal.