The Countess reveals that Edoardo had bribed the guards and escaped. She is sure that Corradino will blame Matilde, who now arrives, followed by Isidoro. He tells the ladies how he saved the day by taking command of the army. Ginardo and Aliprando confirm that the enemy has been routed, but add that Corradino ran off to find Raimondo and challenge him to a duel. Corradino returns, demanding to see Edoardo, but Ginardo discovers that he has escaped. Corradino starts to question Matilde, but Rodrigo enters with a letter for her. It is from Edoardo, who swears undying love for her and thanks her for allowing him to escape. Corradino condemns her to death, to the delight of the Countess (Sextet: "È palese il tradimento" - "Her treachery is obvious"). Isidoro and the guards are to take Matilde to a deep chasm and throw her in. Corradino, alone, meditates on his revenge. He is joined by some peasant women, but their pleas that Matilde be saved ("Mandare a morte quella meschina?" - "Are you really sending that poor girl to her death?") fall on deaf ears. As they leave, Isidoro, Ginardo, Aliprando and the Countess return. Isidoro describes how he kicked Matilde into the gorge, amid conflicting emotions from the others.