A ghost named One Boo Bascom has moved out of his drafty old castle. The house he chose to move into belongs to Monica and Sandy's Aunt Agatha, who runs straight to her brother's the moment she sees Bascom.
The girls get a job as hostesses on a cruise ship. They manage to sneak Dinky on board without the Captain knowing. The Captain soon discovers him and locks him in the purser's office.
Monica and Sandy got a job at the circus for the next two weeks. They will be running the hospital benefit kissing booth. Uncle Dudley is helping them build their booth. Dinky is along to cause some chaos like destroying the girls' booth.
As Uncle Dudley is looking for a late night snack, Dinky's antics attract the attention of an officer on patrol and a reporter looking for a story. Monica and Sandy offer to find him that story.
Monica and Sandy find out that Camp Kookiehaha needs a camp counselor for the summer. They decide it would be a great way to get out of the house, and get Dinky out of Uncle Dudley's hair.
Uncle Dudley is complaining about the cost of dog food. Sandy tells him she can help because she has accepted a job for her and Monica to do some lite housekeeping. Monica points out that Sandy has read the ad wrong because it is really a job for lighthouse keeping.
Sandy reads an article in the newspaper that says the movie studio is looking for a dog to star in a new movie and thinks Dinky should go to the audition.
Uncle Dudley receives a telegram informing him that his rich Great Aunt Hortense is coming for a visit. He is trying to impress her so she will leave him everything in her will. She intends to leave her fortune to the neatest, quietest relative with the most orderly home life, and she absolutely cannot stand dogs. Sandy has the clever idea to clean out the attic so that they can hide Dinky up there during Hortense's visit.
Sandy tells Uncle Dudley that she and Monica will pay for the damages caused by Dinky, so they go out to find a job. As they are driving around, they see a help wanted sign at a rundown hotel called the Heap Cheap Hotel.
Uncle Dudley is angry at Dinky again, this time because he destroyed the plumbing. This means that Monica and Sandy have to find jobs once again to repair the damage. Luckily for them, they are walking through the park when they are offered a job. They are asked to get the park ready for the new playground dedication by the mayor.
Everyone is at the supermarket so naturally Uncle Dudley starts complaining about how much it costs to feed Dinky. On the drive home, Sandy comes up with a great idea for her and Monica's next new job. She suggests getting a job on a farm so they can earn money and learn how to grow their own food.
Uncle Dudley and his nieces have taken a drive to the shore to enjoy a day at the beach. Uncle Dudley keeps Dinky busy by throwing a Frisbee for him to catch, as Sandy plays a harmonica and Monica plays a guitar. They all plan to see Buck Ferris and "The Bong Show" on the pier later that day.
Uncle Dudley is setting up his projector and screen as his nieces make popcorn to see his new home movie. Dinky, causing trouble as usual, destroys the house again before the movie is over. So he girls start driving around town to find a job to pay for the damages. They see a help wanted sign at the art studio of Tooloose Van Stop. He gives them a job to help him create his latest masterpiece to impress his benefactor, Melvin McBuck.
Uncle Dudley drives Monica and Sandy to the Ice Arena since they will participate in the "Happiness on Ice" show. They bring along Dinky, who causes no small amount of trouble.
