n 18th century Naples, Don Alfonso wagers that the two girls, Fiordiligi and Dorabella, are no more trustworthy in matters of love than any other women. The girls sing of their love, before Don Alfonso tells them that their lovers are to be called away to the war. Despina, bribed by Don Alfonso, urges the girls to find other lovers, but they declare their constancy. Guglielmo and Ferrando return, disguised as Albanians, but the girls remain firm. They agree to Despina's suggestion of harmless flirtation, each unwittingly choosing the other's partner. The success of the two Albanians, in spite of Fiordiligi's more prolonged resistance, leads to a wedding. The men now appear as themselves and pretend shock and horror at what is afoot, before revealing their plot. All ends happily, as Don Alfonso urges the power of reason in these circumstances.
This production by the Zurich Opera House had it premiere in Febuary 2000. The renowned soprano Cecilia Bartoli made her debut here as Fiordiligi, after having sung the two other Cosi roles, Despina and Dorabella, previously.