As Gilbert nervously prepares for his annual review with the Wardens, Sadie takes care of Selina's boss' rabbit Lollipop. The rabbit takes a liking to Gilbert, annoying him so much that he convinces Sadie to cast a calming spell.

When Gilbert and Sadie get into a squabble in front of the Wardens, they're sent packing with a transformation spell as homework. To make things worse, the Wardens decide to send a magical cat as mentor to Sadie's home.

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.