Penny Posner knows everything there is to know about good luck. Every day she wears her lucky bracelet on her wrist, her lucky socks on her feet, and Ferdinand, her lucky frog keychain, on her belt loop. And today she needs all the luck she can get so she'll be chosen to blow the shofar at the school's Rosh Hashanah picnic.

But when she picks up a lucky penny, her best friend Mara warns her that it's actually bad luck, because it was face down. As everything starts to go wrong, Penny will try anything to change her luck, but all she does is make matters worse. Penny needs to shift her perspective on luck and fix her mistakes before the picnic and before she ruins her friendship with Mara, so she can make a fresh start for the new year.

A comedic tale of superstition and how our perception influences our experiences and the world around us, with bouncy illustrations by Jon Davis.