The young Arthur runs the back passages of Londinium with his crew, not knowing his royal lineage until he grabs Excalibur. Instantly confronted by the sword's influence, Arthur is forced to make up his mind. He joins the rebellion and a shadowy young woman named Guinevere. He must learn to understand the magic weapon, deal with his demons, and unite the people to defeat the dictator Vortigern, the man who murdered his parents and stole his crown to become king.

«King Arthur: Legend of the Sword» is an upcoming fantasy film directed by Guy Ritchie and written by Ritchie, Joby Harold and Lionel Wigram. An origin story of King Arthur, the film stars Charlie Hunnam as the title character, with Àstrid Bergès-Frisbey, Djimon Hounsou, Aidan Gillen, Jude Law and Eric Bana in supporting roles.