The story of young King Arthur who succeeded in drawing the powerful sword of Excalibur from the rock where it is lodged. He has to control his sword and unite the people under one front in order to defeat the tyrannical Vortigern, who had killed his parents and seized his throne in the past.
Young Arthur runs the back passages of Londinium with his crew, not knowing of his royal bloodline until he succeeds to draw the sword, Excalibur, that was embedded in rock. Instantly realising the sword's power, Arthur decides to use it in joining the rebellion and an enigmatic young woman named Guinevere. Arthur must learn to master the sword, face down his demons and unite the people to defeat Vortigern, the dictator king who happens to be his uncle that murdered his parents and stole his crown.