 With the land in anarchy, warring overlords, Arthur Pendragon (Mel Ferrer) and his half-sister Morgan LeFay (Anne Crawford) meet as arranged by the sorcerer Merlin (Felix Aylmer) to discuss how to end the bloodshed.Morgan maintains that as she is the only legitimate offspring of the late king, the throne belongs to her, but Merlin puts the adversaries to a test to determine England's rightful ruler.Merlin leads them to Excalibur, a sword embedded in an anvil, and says that according to legend, whoever can remove the sword shall be England's true sovereign.