In the fantasy state of Olivia, the robber chief Gasparone is up to all sorts of mischief. But Prefect Nasoni is not only worried about him, his son Sindulfo is also causing him headaches. He is supposed to marry Countess Ambrat, but loves Ita, the niece of Massaccio, a somewhat obscure existence. Then the elegant Erminio appears, and the countess makes eyes at him. Confusion after confusion until Massaccio is unmasked as Gasparone. Erminio turns out to be a civil servant who was set on Gasparone and now gets his beautiful countess. Sindulfo is the last to embrace his Ita.