After a night at the opera, Edmundo and Luca Nbile are having 18 wealthy acquaintances over for a dinner party at their lavish mansion. The servants inexplicably begin to leave as the guests are about to arrive and, by the time the meal is over, only Julio, the majordomo, is left. Luca cancels a planned surprise involving a bear and three sheep upon discovering that guest Sergio Russell does not like jokes, but there are a few strange occurrences, such as the guests somehow entering the mansion and going upstairs twice, Edmundo repeating his toast to the opera singer Silvia, and Cristin Ugalde and Leandro Gomez greeting each other three times (as strangers, cordially, and antagonistically).