To fury, Blue excalibur focuses on a world in which a special race of warriors called excaliburs have become the main ruling force in the world. They’re kinda like a cross between knights and wizards. Amidst all this is a boy named leo del-rey who is known as the titular blue Excalibur who is destined to lead humanity to victory in an event called the second divine conflict. The manga is mostly about him and his adventures with his friends and will also explore the excalibur universe.