After Granny takes a cab home and gets charged for the ride, she decides that it is time for her to learn how to drive. The taxi driver who took Granny home is having trouble collecting the fair, and after a series of events begins to believe that he is in a mental hospital. Granny, during her driving lesson, mistakenly gets on the road.

Granny is preparing for the battle of the Culpepper plantation. General Grant arrives with a hangover. Mr Drysdale dresses as a southern General & Miss Jane is his private. When the Clampetts arrive the battle has started already. as General Grant comes riding down the hill on his horse, Granny takes aim & shoots him off its back. He gets up & she shoots him off again.! He manages to make it to the porch & Granny can't forget her doctorin' so she gives him first aid from her jug.

(The Clampett's are still unaware that this is a civil war movie and not the real General Grant.)