Frannie Miller, who cannot wait to grow up and work in an office with a swivel chair and her own assistant, causes havoc when she tries to help out while on a school field trip to the local radio station.
Frannie must rethink her dream of becoming a veterinarian after she and Elliott, her future assistant, cause chaos by letting her Aunt Magoo's dog, Bark, loose in a veterinarian's waiting room.
When she is named Principal for the Day, Frannie wonders if principals assign their own punishment when they get in trouble for using office supplies or accidentally set off the fire alarm.
When Frannie and her mother accompany her father on a business trip to Florida, Frannie would rather help him at the conference hotel than go with her mother to Princessland theme park.