After a storm, another rift has opened between the human world and the magical realm. The Wardens get Sadie to help seal it, but she insists on bringing her school project, a watermelon "baby", along for the ride.

In the cafeteria one day, Sam stumbles with his tray of food. On a reflex action, Sadie shoots out a spell to stop him falling, which results in Sam and his tray levitating in front of everyone. Will her magic be exposed?

Mordecai decides to put the young wizards to a test, swapping the two mentors with their proteges, so that Gilbert is assigned to Blaine and Cornelius to Sadie.