He has had himself named Serafina's guardian; now she has grown older and more attractive, he plans to marry her for her fortune. But Serafina loves Don Ramiro, whose father is the mayor of Menorca. He asks her guardian for her hand. Don Fernando, unable to justify denying the request, must create a ruse. The story is explained by Agnese, keeper of the castle. Don Meschino is in love with Agnese's daughter, Lisetta, and asks to marry her. She refuses, but at that moment a storm blows up, during which Don Alvaro and Chiara appear. They ask Agnese and Lisette for assistance, without revealing their identities. That night, the pirate Picaro, a former servant of Don Fernando's, appears looking for work. Don Fernando offers him a reward to prevent Serafina's wedding. Picaro disguises himself as Don Alvaro and presents himself to the lovers; believing her father found, Serafina is persuaded to postpone her wedding. Chiara arrives disguised as a beggar, but is not recognized by her sister. She and the true Don Alvaro confuse Picaro, who repents and promises assistance, but then flees. In search of their leader, the pirates storm the castle, capturing Don Meschino, Lisetta, and Chiara. Picaro enters, now undisguised, and frees the prisoners. The sisters are reunited, and Don Ramiro swears eternal love to Serafina. In the end, all believe that Chiara has fled with the pirates, but she returns with Picaro. No complete recordings of "Chiara e Serafina" exist, but one number has been recorded by Opera Rara and released as part of an anthology.