Young Evy Edwards develops special powers when she eats a salad with a mysterious salad dressing. When Coach Janet discovers her, she immediately asks Evy if she would like to train to become a hero.
During training Evy struggles with her clumsiness, and starts to doubt whether she is cut out to be a hero. Just when she is about to quit, a troll attacks her school. She is the only one who will be able to save her friends.