Kaz boldly asks the most popular girl in school to the upcoming school carnival but is rejected, and tries to save face by claiming he already has a girlfriend. Much to Oliver's chagrin, Kaz invites Skylar to accompany him to the carnival, her first venture into the "normo" world, in hopes of convincing everyone that she is his girlfriend. Meanwhile, Alan tries to prove his worth to his uncle Horace by attempting to cure Titanio, a superhero with amnesia.

Oliver uses his burgeoning medical skills at school when he performs CPR on a popular girl's poodle, which quickly elevates his social status much to Kaz's chagrin. When the popularity goes to his head, Kaz cuts Oliver down to size, literally, with a shrinking ray. Meanwhile, Horace cannot perform surgery on Citadel, an ailing superhero with an impenetrable metal exoskeleton, so shrunken Oliver is sent inside the hero's body to diagnose the problem.

Tension is high at Logan high, and Kaz becomes suspicious that his substitute teacher is actually Dr. Wrath in disguise, a supervillain who feeds on negative energy. While Kaz is determined to get to the bottom of it, Oliver helps Alan get over his aversion to normo food.

When Horace complains that comic book sales are down, Oliver and Kaz join the writing staff to help spice up the books. However, the boys' altered versions of the stories cause problems in the superhero community.

Horace introduces the boys to an all-powerful device that looks like a pen, but can bring any illustration to life. Panic ensues at the hospital when the device goes missing.

Jordan theorizes that superheroes are real; Stefanie calls Skylar out for having a fake identity.