Gist is that Elvira inherits her aunt's dilapidated mansion in an uptight New England town. The treasure, however, is her book of "recipes" which consist of spells. You see, her aunt was a witch and her surviving uncle, who wanted the book for himself, a necromancer of some persuasion, tries to steal the book and kill Elvira. That is the gist but the flick is mostly humor that comes out of Elvira being an outrageously groovy chick in the repressed town that was probably a lot like the one in Footloose. Also, dudes are basically constantly trying to rape her.
In addition to the lovely Cassandra Peterson (still gorgeous as a senior citizen) as Elvira, more on her later, there are actually some actors I recognize. Some include Edie McClurg (she was a high school student in Carrie and was the one who called Ferris Bueller a "righteous dude" in Ferris Bueller's Day Off) plays one Chastity Pariah, the guy who played Kenickie in Grease (his name was Jeff Conaway), Frank Collison who I think of as the "she r-u-n-n o-f-t" guy in Oh, Brother Where Art Thou and the guy obsessed with hotdogs in The Happening, William Morgan Sheppard who is such a that guy, Kurt Fuller who always plays someone who is super punchable, and Dick Miller, he was the guy that knew what gremlins were in Gremlins, is in a movie that Elvira watches at some point.