Alexander “Alex” Elliot is a twelve-year-old boy who starts a new term at school while struggling to adapt. After finding the legendary sword Excalibur, he is thrust into an ancient battle against the wicked sorceress Morgana. With the help of the wizard Merlin and his newly knighted friends, Alex must embrace his destiny as a descendant of King Arthur to save England from enslavement before a total solar eclipse allows Morgana to emerge fully into the world.