Giannello was the son of a goldsmith, who had been commissioned to set some jewels for Monna Biancaone, one of the great ladies of Pisa, and mother of the beautiful Vanna. Father and son set out together to take the jewels to the lady. Vanna is gathering roses and loses her ring. Gianello finds it for her, and she binds up his hand, which has been torn by the thorns. From that day the young people think of nothing but each other, though their station in life is so far apart. Vanna, however, is betrothed to Sir Guido Colonna. Gianello, divining that another will gather the sweet flower, climbs the wall of the palace to see Vanna once more. He is surprised by some of the palace retainers and taken for a thief. He is led into the presence of Vanna and her mother, and the young girl identifies him as the goldsmith's son and asks to have him taken back to his father. This is done, Gianello protests to his father that he is not a thief, but says that no one shall ever know his secret.