New York Gilbert & Sullivan Players present The Grand Duke. When Ludwig gets into a statutory duel -by cards rather than weapons - he lets slip a conspiracy to bring down the mean-spirited Grand Duke. Instead, Ludwig is made Grand Duke for a day, and is to be married. And married. And married again, as several seek to take their place by his side. Of course, everything has been based on a misunderstanding, as this twisted and hilarious tale comes to a happy close.