While in class as Linda Lee, Supergirl uses her x-ray vision to look out for any trouble that she could help with in secret. Seeing an old man drowning, Linda slips away and as Supergirl, burrows under the lake and creates a water spout to free the old man. To her surprise, the old man looks a lot younger, but she dismisses it. As it turns out, the water she saved the man from turns out to be a fountain of youth, and her exposure to it has transformed her into a superbaby.