Beetlejuice

In Winter River, Connecticut, Adam and Barbara Maitland are spending their vacation decorating their large country home that local real estate agent Jane Butterfield constantly pesters them to sell. As a hobby, Adam is building a scale model of the town in the attic. While driving home from town, they swerve to avoid a stray dog, and their car plunges off a bridge and into the river. They arrive home but are unable to recall how they got there. When attempting to leave the house, Adam finds himself on Saturn's moon Titan, populated by enormous sandworms. This lasts mere seconds for him, but after Barbara rescues him, she tells him he was gone for two hours. After noticing they lack reflections and discovering a Handbook for the Recently Deceased, the couple realizes that they drowned in the river and are now ghosts.
The house is sold to New York City real estate developer Charles Deetz, his goth teenage daughter Lydia, and his second wife Delia, a talentless sculptor. Under the guidance of interior designer Otho Fenlock, Delia begins renovating the house with a new-wave aesthetic of postmodern art.
While consulting the handbook on how to eject the Deetzes, the Maitlands see an advertisement for "Betelgeuse". Following the handbook's guidelines, they travel to an otherworldly waiting room populated by other distressed souls. After navigating the afterlife's complex bureaucracy, the Maitlands return to their house, only to discover it completely redesigned. Their caseworker, Juno, informs them that three months have passed and they must remain in their house for one hundred twenty-five years before "moving on." She discourages them from contacting Betelgeuse, her former assistant-turned-freelance "bio-exorcist" who can only be summoned by uttering his name three times, and implores them to drive out the Deetzes themselves.
Adam and Barbara are invisible to Charles and Delia, thwarting their fright attempts. Lydia, however, can see them, which she attributes to her extrasensory perception. The Maitlands invoke Betelgeuse and are transported into the model, but find his crude, morbid demeanor offensive. The Maitlands possess Charles, Delia, and their wealthy friends during a dinner party, but their antics amuse the group, inspiring Charles to pitch a supernatural amusement park to investor Maxie Dean. The Deetzes uncover the model in the attic, where Otho finds the handbook. Betelgeuse transforms into a giant snake and terrorizes the Deetzes before Barbara banishes him back to the model.
Juno berates Adam and Barbara for releasing Betelgeuse, letting themselves be photographed by Lydia, and losing the handbook to Otho. A depressed Lydia discovers Betelgeuse inside the model and nearly summons him in exchange for passage to the afterlife, but the Maitlands return to stop her and talk her out of suicide.
Maxie and his wife arrive, demanding evidence of paranormal activity, but the Maitlands refuse to manifest again. Using the handbook, Otho summons Adam and Barbara by using their wedding clothes, but he mistakenly mixes the incantation with an exorcism, causing them to rapidly age and decay and leaving them in a state of perpetual suffering.
A horrified Lydia invokes Betelgeuse, who promises to help if she marries him so he can remain in the mortal world. He saves the Maitlands, disposes of the Deans, and drives away Otho before preparing to wed Lydia. The Maitlands attempt to banish Betelgeuse, who teleports Adam to the town model and Barbara to Titan. Barbara rides back inside on a sandworm, which devours Betelgeuse.
The Deetzes and the Maitlands agree to harmoniously live together. Meanwhile, Betelgeuse is stuck in the waiting room, waiting his turn to see a caseworker. He attempts to steal a numbered ticket from a witch doctor's ghost, who retaliates by shrinking his head.