It's wizard report card time, and Alex isn't doing at all well and needs to have her card signed by her parents. She tries to hide it from them, but when she can no longer hide it, she panics and transforms her parents into guinea pigs and loses them. Worst of all, the Russo siblings' Wizarding Professor is on his way to talk to her parents.
The young wizards learn a body switching spell. Alex turns 15, time for a big celebration, her non-magical maternal grandmother comes for the party. Alex does not understand why the party is such a big deal and uses the body switch on her mother.
Alex wants to do well in art history without any work, so on a school trip to the art museum she brings historical paintings to life to help her. Meanwhile Jerry and Max find a way to play football in the house which doesn't turn out well.
Alex and Harper enter an academic contest, for which Alex wears a pair of "smarty pants" that gives her all the answers, without any regard for Harper. Elsewhere, Max starts a water bottle business at school.
Justin and Max steal Alex's diary only to have it stolen again by Gigi, Alex's arch nemesis. In an attempt to recover the diary, the brothers accidentally place Gigi inside the book and into Alex's secret fairy-tale princess world.
In an effort to spend time with Dean so she can talk him into becoming her permanent boyfriend, Alex invites him to the Russo family basement/garage to help fix an old car that Jerry never had time to take care of and enter it in a race in New Jersey. However, he proves to be so good he ends up gaining the admiration of the rest of the Russo family, especially Jerry, which hinders her plans for alone time with him. Meanwhile, Justin taunts Max for his recent purchases of suspicious items from the World Wide Wiz-Web, some of which turn out to work, even if they don't ...
The Russo family is assigned to a popular convention to be on the lookout for rogue wizards who use magic to stir up trouble. But when Alex and her brothers go to the convention on a special assignment, Harper is along for the ride for the costumes. Alex is starting to feel compelled to reveal to Harper just who she really is.
Fearing that her parents might break up on their anniversary, Alex orders Cupid from the world-wide wiz-web. The trouble is, the couple he ends up bringing together turns out to be... of all people, Justin and Harper!