Clara Humble thinks she might have superpowers. Which is convenient, because things aren't going so well for Clara. Students from rival school are moving into her school for the term, and Clara's favorite neighbor, Momo, is moving to a retirement home. Together with her best friend, Clara becomes convinced that her knack for making liquids spill, overhearing her parents' conversations, communicating with her pet chinchilla, and maybe even mind-controlling teachers could be used to put a stop to these injustices.