Professor Boris Conklin can now revitalize DNA samples from anyone (or anything!) in history, returning that person to life. Unfortunately, those who invested in Conklin's work want him to revitalize world-class monsters like Frankenstein, Dracula, the Mummy, and others to serve as attractions at his estate turned into an amusement park - Monster Park. But the Professor's down-and-out niece, Marlene, wants the estate for herself and plots to have her uncle hauled off to a sanitarium. She chooses the very weekend a test family is due to get a sneak preview of Monster Park. Between the wacky monsters, the obnoxious test family, and a psychiatrist who thinks everyone is crazy, chaos reigns!