Cosi Fan Tutte
By Wolfgang Amadeus Mozart
The setting is in 18th-century Naples. Two young suitors, Ferrando and Guglielmo, take up a wager with the older and wiser Don Alfonso that the moment they turn their backs, their sweethearts, the sisters Dorabella and Fiordiligi, will forget them and fall in love with the first person who comes along. To make sure that they can see this for themselves, he tells the two young men to disguise themselves as foreigners, who have heard of the beautiful sisters and to woo them--and so the fun begins.