Jethro decides to turn his favorite thing eating into a job by getting the family involved in buying a diner. The family's choice of offerings lead to a lack of customers so Mr. Drysdale tries to fix things.
Jethro worried that his diner the Hungry Gizzard has no customers, has a wonderful idea. He busts in on Mr. Drysdale trying to impress the wealthy Vanderpools announcing the restaurant is going topless. Confusion insues.
Granny wants to leave sunny California because she misses the winter season sending Mr. Drysdale into a panic. The banker enlists Miss Jane in an elaborate scheme to convince the Clampetts that a blizzard has occurred.
After Mrs. Drysdale complains to Granny they have a physical brawl. It leads to Jethro explaining to Jed and Granny about TV wrestling. While watching Granny thinks its real so she decides to rescue Rebecca, one of the performers.
Granny is worried about Miss Jane's spinster hood and convinces Jethro to ask her to marry him. Granny assures him that she will decline the proposal but Hathaway accepts leading to panic in the Clampett household.
Jethro is on to his next big idea and wants to play the violin. Jed asks Miss Jane to find a teacher and she hires Stromboli, a famed classical virtuoso. But the Clampetts want fiddle music so they find someone else.
Granny is on the warpath concerning the chaos caused by Ellie's critters and declares either they go or she does. Mr. Drysdale is equally irritated by the expense of his wife's poodle. Jed tries to find a solution.
Granny and Jethro believe they have psychic abilities but Granny's predictions start to not come true. With her reputation on the line she makes a stock pick for Mr. Drysdale that could cost him a small fortune.
Mr. Drysdale wants to film a Super Banker commercial with the old Clampett cabin before they became wealthy. The shack's return has his wife unhappy and an accident has Granny preparing a brain transplant for Mr. Drysdale.
The Clampetts are concerned Mr. Drysdale is worrying too much about their money. When Jethro misunderstands and believes Britain's queen is broke, the family heads to their English castle to help her out.
Heading to England Jethro smuggles Ellie's turkey buzzard on the plane upsetting Mr. Drysdale and a fellow passenger. After landing they try to meet with the Queen to give her their 80 million dollars. Their butler Faversham tries to clear things up.
The Clampetts fly to London to give the Queen the deed to Canada they purchased. Waiting for an appointment with the Queen they stay at Clampett castle, where Granny is thinks they are at war with a neighboring castle.
In an attempt to get the Clampetts to move back to California, Mr. Drysdale tells Granny about the spirit of Lady Clementine. Her husband was murdered in the Clampett castle. Lady Clementine's ghost is going to return to seek revenge on the person who killed her husband; her little old grandmother.