A girl with extraordinary psychic abilities joins two gifted teen boys at a small ghost-hunting agency to fight the many deadly spirits haunting London.

Old-school magic meets the modern world when young Alex stumbles upon the mythical sword Excalibur. He soon unites his friends and enemies, and they become knights who join forces with the legendary wizard Merlin. Together, they must save mankind from the wicked enchantress Morgana and her army of supernatural warriors.