Mr. Drysdale's latest ploy involving duping the Clampetts into believing the annual running of the grunion fish is an invasion of the people of Grun backfires when Miss Hathaway revolts and organizes the female bank employees in protest.
The women employees at the bank rebel against Mr. Drysdale's unfair work practices and he locks them in his office. The Clampetts are caught in the middle where Jed tries to hear both sides but Granny takes action.
Jed and Jethro get help from a karate expert's geisha girls to run the mansion, while Granny, Elly, and the bank's secretaries all move into Miss Jane's small studio apartment as a headquarters for their cause.
Dick Bremerkamp, an unemployed actor, sees the lovely Ellie Mae working at the bank and learns of her wealth. To get a chance with her he poses as a bird watcher with Miss Jane and a millionaire to Mr. Drysdale.
The final show of the series. Elly May's intended husband may win out in marrying her for the money. Hathaway tries expose his plan to Drysdale,Granny & Jed. Jethro may wed as well but may or may not return to California.