 Hearing a lay of true love and happiness, Rymenhild swoons with grief, and Horn is filled with remorse for having tried her constancy for so long.Throwing off their disguises, Horn and his company slay Fikenhild, taking the castle for King Ailmar, and Horn persuades Ailmar to make Sir Arnoldin his heir.On their way back to Suddene, they stop off at Ireland, where Reynild is persuaded to make Athulf her husband, and the loyal steward Sir Athelbrus is made king, King Modi having died.