In medieval England, with the kingdom of Camelot under attack, Merlin and King Arthur banish the evil enchantress Morgana and her son Mordred to the ends of the universe as Morgana vows her revenge.Knights of the Round Table descendant, Penn, has grown up disbelieving in the legends of his ancestors, despite his extended family keeping traditions alive. However when Morgana and her son return, hell-bent on destroying every last descendant of King Arthur and his knights, Penn must finally come to terms with who he was born to be. With new power bestowed on him from legendary sword Excalibur, Penn must bring together a new Knights of the Round Table to save both themselves and the earth from Morgana's total vengeance.