The Cathedral of Palermo. Against a background of chanting monks, Bertram reveals to Robert that he is Robert's true father and is willing to renege on his obligation to deliver him to the devil. Enter Alice, with news that the Prince refuses to marry Isabelle. She also reads her mother's message, which is to shun the man who betrayed her (Bertram). Midnight now strikes, and the time for Bertram's coup is past. Bertram falls down into hell, and Robert falls into the arms of Isabelle.