The episode starts with a meteorite heading straight for Hub City's Spring Lake and with a splash, it suddenly made the lake look almost magical. The next morning, Lief, Dennis, and Gnasher where walking to school talking to each other about how grown-ups are. Lief thinks that they are a bunch of killjoys, and Dennis agrees so they make fun of them by saying things adults always say to the kids.
Suddenly, Gnasher fell into the lake but Lief and Dennis help him out. As Gnasher shook the water off him, Dennis asks if he's okay and Lief insists that he's fine. But just then, Gnasher's fur began to sparkle and his body shrank into the size of a puppy!
When they made it to Hub High, Lief and Dennis take Gnasher to Komodo in the chemistry lab to look at him. When Komodo was done examining him, Dennis was overwhelmed that he might teach Gnasher to be a menace again. Lief asks Komodo if he has any idea of what might have caused all this as Komodo puts his stuff in his backpack. Komodo will hea