The movie is a retelling of the classic legend of King Arthur. The story begins with young Arthur (Gwilym Lee), who pulls the sword Excalibur out of a stone, declaring him the rightful king of England. As Arthur grows up, he becomes a great warrior and leader, with the help of his friends Lancelot (Orlando Bloom) and Guinevere (Keira Knightley). Together, they battle against the evil forces of Mordred (Christian Cooke) and the Saxons.