Alex Russo brings a mischievous and exceptionally powerful student, Billie, to her brother Justin's home in the hopes of coaxing him out of retirement to teach her.

Billie's use of magic outside of the lair gets her in trouble with Justin, and her fear of being kicked out of yet another home bubbles to the surface.

On her first day of school, Billie uses magic to impress Roman's best friend. But when a jealous Roman steals Billie's wand, he falls into the grasp of a wizard-hunting phantomus!

After finding out about the prophecy, Billie avoids using magic, but when a magical creature causes mayhem in the Russo house, Billie worries it's somehow still her fault.

After discovering that Billie and Roman are missing, the Russos work together to rescue them from an evil villain's clutches.