Katie Hart's two brothers and their friends are already making Katie's life miserable, but when Will Madison begins playing practical jokes on Katie, she decides to get even

Katie Hart's friends want her to run for class president against Lynne Colby, one of the most popular girls at school. If Katie doesn't run, Lynne and her snobby friends will take over the seventh grade. Katie knows she'd make a better president than Lynne, but a nasty rumor may keep her from winning.