The wizard Merlin schemes to bring about the reign of a great king, resulting in the rise to power of Arthur, who unites the people and strives to achieve peace for his subjects. However, Arthur's rule is plunged into chaos by a secret affair between his wife and the mightiest of his knights, while his evil half-sister plots to destroy him. Fantasy adventure, starring Nigel Terry, Helen Mirren and Nicol Williamson.

Arthur fulfills his fate by bringing together the Knights of the Round Table at Camelot and unifying the country. However, this flawed monarch faces greater tests ahead in pursuit of love, the Holy Grail, and his nation's survival.