
Justin embraces mortality to live with his family; his new challenge arises when Alex introduces Billie, a wizard-in-training, seeking Justin's mentorship.
When Justin forbids Billie from having a haunted house, she takes Justin to Halloween future, present and past in an attempt to help him rediscover his Halloween spirit.
Billie, Roman, and Winter sneak into the Wizard World, so Billie can compete in an underground magic battle: Battle of the Wands. Meanwhile, Milo covers for the kids at home.
After losing Alex, Billie is convinced her powers are too dangerous and thus relinquishes them to keep her family safe.
Without her powers, Billie is forced to enlist the help of an old foe to break into the most secure wizard facility in the world.