Eight-year-old Mia Macarooney is delighted to learn she is from a family of superheroes, but her acceptance into the Program for In Training Superheroes requires she take a placement exam.

"Mia finds out that her regular school will be putting on a play about superheroes. As soon as the casting call goes out, Mia's sure that the main character role was made just for her. Because after all, who better to play the part than a real-life superhero? But when show day comes around and nerves are running high, will Mia be able to take the stage and be herself without revealing her super-secret?"--Publisher marketing.

Unable to control her super-strength, Mia accidentally causes mayhem at school and must rely on her friends to help her repair things.

As part of her new mega-botany class at the Program for In-Training Superheroes, Mia Mayhem has to grow a plant from superseeds all on her own, but when her plant grows out of her control, she must find a way to stop the ensuing chaos.