Arthur (Clive Owen) was separated from his family in the war and was adopted as a handyman. However, the magician predicted that he would become the sacred British monarch, and Arthur even drew the "sword in the stone" to confirm his future. When he saw the chaos of the country, he vowed to free the entire British Isles from the brutal Roman rule. So he made up his mind to build a brand new home full of peace and tranquility. Arthur's bravery and extraordinary spirit impressed some very excellent knights, who joined his team and organized them into the famous "Knights of the Round Table". Under Arthur's leadership, these heroic soldiers have achieved proud results. The knights encountered the "Blue Army"-guerrillas of poor people and vagrants-also invaded by the ferocious Saxons. Build a fighting alliance with their leader, Gwineville (Keira Knightley), for the fight. What story will happen when two former enemies work together?