 Herman finds out that his family has won a contest, organized by Event Magazine, as the American Average Family of the year. The prize includes $5,000 dollars, and in order to win the money the magazine must send two reporters, to make an article and take some pictures of the family. Every member of the family must appear in the family portrait, and things got complicated when Grandpa says that he ll be out of the house. Herman gets furious with Grandpa, and demands him to stay with the family, in order to get the money prize. But Grandpa has made up his mind and that day he disappears. Herman, Lily and Marilyn are looking for him desperately, but there s no signal of Grandpa inside of the house. Herman and Lily decide to go out and look for Grandpa, in the places most frequented by him. They go to a restaurant, they look at the square, but nothing. Meanwhile, Marilyn receives the two reporters in the house. One of them begins to flirt with Marilyn, while the other starts to feel scared when he sees estrange things in the house, like Eddie playing or even Grandpa, who in fact never left the house and was hided in the basement. Herman and Lily return without success. During the night, the reporters are trying to get some sleep, but the scared one gets up for a glass of water and when he sees Herman and Lily walking in their pajamas by the corridor, he feels more scared and with his fellow begins to explore the house. However, when they bump into Herman, Lily and Grandpa, they run away from the house, despite the warnings of the magazine director, about returning without the average family story. Next day, the Munsters family portrait appears in the cover of the magazine. But there s a little detail, because in the cover says that this average family likes to celebrate Halloween every day of the year.