Jacinto, a retired bullfighter who lives miserably with his nephew Pepote, receives a letter in which he is informed that, according to an old agreement, he must participate in a mock bullfight that will be celebrated that day in Las Ventas bullring. The letter seems to him a joke in bad taste, since he has not signed any contract; but while Jacinto is picking up cigarette butts around, he checks that his name is on the poster.