Billie and Justin must work together to undo a spell when Billie's prank goes awry. Roman gains muscles thanks to a magical muscle tee. Milo's class pet gets loose in the house.

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.

When Billie can't join Roman and Winter's team for a robotics competition, she enlists Milo and uses magic to design an over-the-top robot of their own with disastrous results.