While on their way to Los Angeles for a "Shoe Convention," the Bundy's car breaks down in the small town of Lucifer, New Mexico where they meet an old prospector who gives them a map to an old gold mine in the area in exchange for their car. They phone Marcy and Jefferson who come to the rescue, thinking that the kids are dying. But it turns out that Al and Peggy want their money for the mine deal. Then the six of them go off in search for the gold...