Mayberry gets an invitation to join a sister city program by the United States government. The city council approves of the idea and is then to arrange for a delegation from their Mexican sister city, Puerto Bello, to visit Mayberry. Mayor Juan Nunez and Pablo Santos arrive in town. Juan presents the town with a very expensive looking goblet. Sam has the men over for what he thought would be a simple lunch. But Aunt Bee has a fancy meal served with Goober as the butler. While the men are outside, Sam tells Aunt Bee that she shouldn't be putting on airs the way she is. Aunt Bee says they must come from a very rich town and they should be treated that way. Sam overhears the men talking about how impressed they are with Mayberry. Sam also hears that they spent half the town treasury to buy the goblet. He tells Aunt Bee what he heard. That night at the ball, Aunt Bee finds a gracious way to return the goblet and she presents her sign to Mayor Nunez.