Balthazar Blake is a master sorcerer in modern-day Manhattan trying to defend the city from his arch-nemesis, Maxim Horvath. Balthazar can't do it alone, so he recruits Dave Stutler, a seemingly average guy who demonstrates hidden potential, as his reluctant protégé. The sorcerer gives his unwilling accomplice a crash course in the art and science of magic, and together, these unlikely partners work to stop the forces of darkness.

Every hundred years, the evil sorceress Morgana returns to claim Fingall's talisman from Merlin, with which she intends to destroy the world. For the last fourteen hundred years she has failed... now she intends to conquer all. Young Ben Clark moves with his parents to a new town, where he befriends his elderly magician neighbor, Milner. Ben has a natural talent for magic and wants to learn all that he can from this old man. Ben carries the same scar as the original staff-bearer 1,400 years before. Both Morgana and Milner, who is revealed to be Merlin, see this as a sign that this time, the battle between good and evil will be stronger and harder than ever. Ben must make his own choice between good and evil as he is drawn into a battle and must draw on his own spirit and magic to decide which path to follow and hence, the fate of the world as we know it.