The Munsters come to America to search for Herman's brother-in-law Norman Hyde, and they discover that he has turned himself into Brent Jekyll, who is running for Congress, and Grandpa must make a formula to change him back into Norman.

In Transylvania, an enraged crowd expels the Munster family from their castle. While escaping from the villagers, Herman finds a piece of a letter from his sister Elsa Munster Hyde and brother-in-law Norman Hyde from North America, and the family decides to travel to California. When they meet their niece Marilyn, they are informed that Norman is missing and his wife is in a coma. On the next days, the Munster family tries to adapt to the new country: Lily meets her snoopy neighbors; Grandpa researches in the laboratory a cure for Elsa and finds a videotape that shows what happened to Norman; and Eddie goes to the school and tangles with the local bully. When Senate candidate Brent Jekyll arrives in the location to campaign, Grandpa discloses the truth about the past of the bigoted candidate.—Claudio Carvalho, Rio de Janeiro, Brazil