The Munster family is tired of being persecuted back in Transylvania, and on finding part of a letter from cousin Marilyn in California, decides to head to the United States. On arrival they find that Marilyn's father, Normann Hyde, is missing, and her mother (Herman's sister) Elsa Hyde is in a coma. Marilyn details this in the letter but Spot burned the mail (and the letter carrier) so this comes as a surprise to the Munsters.