When Herman Munster inherits a real state in England with the title of Lord, his family and he travels to England by ship. Along the journey, Marilyn Munster falls for Roger Moresby, who is a racer and fan of racing cars. When Herman and his family arrive at Munster Hall, in Shroudshire, they learn that the locals hate them. Soon Herman and Grandpa learn that their English branch of the Munster family are involved with counterfeit, under the command of the notorious The Gryphon. But Herman needs to participate in the car race to honor the Munster name and The Gryphon is planning to kill him.