Maude loves to fight for what she believes in and protest against what's wrong. Pollution? Let's get rid of it. Styrofoam lunch trays? Buh-bye But when she decides to protest tag, the favorite recess game of the boys in her class, she kicks off a big girls-versus-boys prank war.
Soon there's sneak attacks and secret plots, a girls-only newspaper, a doughnut filled with cheese, and one stolen chicken. Maude gets lots of opportunities to protest, but in the end, it's her best friend, Miranda, who learns to stand up for what she believes in.