 Emperor Claudius became another Roman emperor, Otho (Ottone), who had already appeared as a protagonist in Monteverdi's "L'incoronazione di Poppea" (1642) and in Handel's "Agrippina" (1709).The Roman Emperor Ottone is in love with Cleonilla, who can't resist flirting with two young Romans, Ostilio and Caio.Ostilio is in reality a woman, Tullia, who disguised herself because she's in love with Caio.