Prince Ariodante and Princess Ginevra, the daughter of the King of Scotland, are in love. When Polinesso, who wants the throne for himself, deceives Ariodante into thinking that Ginevra has betrayed him, everyone thinks Ariodante has thrown himself into the sea and Ginevra, distraught, is imprisoned for her infidelity. Polinesso offers to champion Ginevra but is defeated in public combat by Ariodante’s brother Lurcanio who, intent on avenging his brother’s apparent death, challenges any other champions to come forward. A knight with his face hidden defends Ginevra’s honour before revealing himself as Ariodante. A courtier brings news that the dying Polinesso confessed to his treachery. The King hurries to free his daughter and she is reunited with Ariodante to much celebration.