Elvira, a sharp-tongued, voluptuous Los Angeles horror hostess, dreams of funding a Las Vegas stage show. When her wealthy, puritanical great-aunt Morgana passes away, Elvira travels to the conservative
Massachusetts town of Fallwell to claim her inheritance. Expecting a fortune, she is instead disappointed to receive only a dilapidated mansion, a mischievous bloodhound named Algonquin, and an ancient, seemingly useless recipe book.Upon arrival, Elvira’s eccentric, punk-rock aesthetic and unapologetic sexuality immediately scandalize the town's prudish moral authority board, led by the uptight Chairman Chubb. The townsfolk shun her, with the sole exception of a sympathetic local theater owner, Bradley. Unbeknownst to Elvira, a much darker threat lurks in the shadows: her sinister, power-hungry uncle Vincent. Vincent, an amateur warlock, wants Morgana's spellbook to unleash ultimate evil and conquer the world. When Elvira rejects his demand to trade the book, Vincent frames her for witchcraft, manipulating the superstitious townsfolk into turning against her in a modern-day witch hunt.Locked in the old-fashioned town jail, Elvira refuses to surrender. Utilizing her quick wits and the hidden magical properties of her family lineage, she manages to escape custody just as Vincent prepares to execute a dark ritual using the recipe book. Elvira races back to her mansion to confront her wicked uncle and rescue Bradley, whom Vincent has captured.A chaotic,
supernatural showdown ensues inside the spooky mansion. Vincent uses dark magic to animate inanimate objects and summon monstrous horrors, but Elvira fights back using her own improvised spells and fearless attitude. During the intense magical battle, Elvira accidentally misreads a spell from the book, which instead of destroying Vincent, causes him to self-destruct in a fiery explosion, vanquishing him once and for all and saving the town from his apocalyptic plans.With the curse lifted and the townspeople finally realizing that Elvira is a force for good, she is hailed as a hero. Although the mansion is destroyed in the chaos, she inherits Vincent’s hidden stash of gold. With her newfound wealth, Elvira triumphantly leaves the dreary town of Fallwell behind, finally achieving her ultimate dream of headlining a dazzling, high-energy Las Vegas show, where she continues to celebrate her iconic status as the Mistress of the Dark with style, humor, and endless glamour.