Twins Lenny and Cassy must overcome a power struggle between two powerful sorcerers and a wicked fairy before they can return home.

Skelton, an apprentice sorcerer searching for magic wizors to help him compete at The Wizor Fair, transports himself from a parallel world to modern day Seattle where he enlists twins Lenny and Cassy to help him, but he accidentally transforms Cassy into a fairy called a whelf.

The twins return with him to the medieval Kingdom of Duscany, but the magic of the Whelf Fen inescapably draws Cassy into the Long Night to compete for the whelf queenship against the evil Night Shadow. Lenny and Skeldon must unravel the mysterious relationship of the shadow wolves stalking the sorcerers of the kingdom, the power struggle between two powerful sorcerers and the whelf battle being waged during the Long Night, which ultimately will decide the fate of the Kingdom of Duscany and perhaps the world.