Arthur (Clive Owen) was separated from his family in the war and was adopted as a handyman, but the magician predicted that he would become a sacred British monarch, and Arthur pulled out the "Sword in the Stone" to confirm his future. When he saw the chaotic state of the country, he vowed to free the entire British Isles from the brutal rule of the Romans. So he was determined to build a new home full of peace and tranquility. Arthur's bravery and extraordinary spirit impressed some very outstanding knights, who joined his team and organized into the famous "Knights of the Round Table". These brave warriors, led by Arthur, made great strides and achieved proud results. The knights encountered the "Blue Army" that was also invaded by the brutal Saxons-a guerrilla group composed of poor people and vagrants. In order to fight, they established a fighting alliance with their leader Guinevere (Keira Knightley). What kind of story will happen when the two former enemies join hands to fight together?