When fifth grader Penny Lowry and her friends learn they will be attending an after-school etiquette class, it brings up a whole new wave of worries for Penny: who knew there were so many ways to make a bed improperly? Or to pass the bread the wrong way at dinner? Yikes!

Even worse, in a lesson on how to write thank-you cards, Penny receives an anonymous note from someone who clearly has a crush on her! Penny isn't ready to have a crush on anyone AT ALL. But should she be? And what about everyone else in her grade? The purpose of etiquette class is to teach kids how to behave like grown-ups. But what if Penny isn't ready to grow up yet?

It's all a lot to handle, but luckily Penny has her dog Cosmo, her friends, and her love of drawings to get her through!