Margie accompanies her dad Vern and his boss Honeywell to a convention. Mr. Honeywell hopes to be elected an officer and Margie in an attempt to help derails the effort. She then tries to fix the situation to save her father's job.
Margie gets a chance to audition for a part in a science fiction TV show with a help of her neighbor. But her father forbids her from acting so she and the crew members play a trick on her dad and Mr. Honeywell.
To help her father Vern with a client Margie agrees to date his son who she thinks is a boy. Margie dresses as an eleven year old but the son Wesley is an adult so Margie also pretends to be her own older sister.
An English gentleman of whom Margie is fond must sell one of his castles to solve a cash shortfall. Margie goes into action and finds an eccentric rich woman who will by a castle on condition it has a ghost so a ghost must be provided.
To show Vern Freddie is not so objectionable, Margie pretends to fall for a person more objectionable than Freddie to Vern, Honeywell's efficiency minded nephew. The plan backfires when Margie is headed for a quick and efficient marriage.
Margie and Freddie track a murderer to a mysterious mansion. Two things Margie doesn't know: The man is a client of her father, and he's never murdered anyone.
Margie hears of a job with one of Vern's clients for which she encourages Freddie to apply. The company wants only married men, so she pretends to Freddie's expectant wife. Later Margie believes that this is true of Vern and Roberta.
Margie asks Vern for a job at Honeywell and Todd, but Vern says no. When Margie's look alike cousin arrive, Vern thinks it Margie in disguise and decides to get even.