Amber Zeller is new in Main Summers Elementary School, and get this, her dad is the principal! In order to go on a tropical trip her family has planned, she needs to get all As in all her classes. Her overall grade slips one day in class, and she has to find a way to bring her grade back up. However, to do this, she must complete a project by spending a whole day with the weirdest person in fifth grade, Brianna Adams. She survives her mom's not-so-good cooking and her sister's constant bugging, but will she survive her Saturday with Brianna so she can go on the trip? Will she get a brand-new friend or foe? Will she feel the sand between her toes and the sun against her face this summer? It all depends on what she's willing to do to get that A.