Sixth grader Tommy and the rest of "the Posse" --- his best friends Angela, Faye and twins Judy and Jury --- band together to help solve a problem in Tommy's neighborhood. They want to stop the cars from speeding by, especially when Tommy's young, deaf neighbor is out playing. Things are going just fine until Tommy's mother takes up a cause of her own --- she is participating in a rally against racism. Tommy can't believe it --- why does she want to call attention to their Japanese-American heritage?