In the year 520 AD, during the bloody battle of Camlann, King Arthur, aided by his legendary sword Excalibur, lands a fatal blow to his traitor son Mordred. Arthur's dying wish to his loyal knight, Sir Bedivere, is to return Excalibur, the source of is powers, to the 'Lady in the Lake.' Nineteen years later, an older Sir Bedivere finds himself in jail after trying to free Arthur's son, Owain, from the town guards when he is caught stealing from Lord Antonius.