 Ranuccio's daughter Ines is in love with Fernando, but her father wants her to marry Antonio who is Don Sebastiano's nephew.Argilla, the gypsy girl of the title, brings together the lovers Ferrando and Ines, saves the life of the Duke, whom she brings together again with his brother, and frees Don Sebastiano, who turns out to be her father.Comedy is provided by the servant Pappacione, fooled into searching for gold in an old cistern.