In 1957, inspired by what she is learning about civil rights and armed with knowledge of female ball players, ten-year-old Katy Gordon fights to be allowed to play Little League baseball.
When her school is shut down due to an asbestos problem, all-star pitcher Gabby Garcia is sent to an upscale private school that already has a star pitcher, and to make matters worse, she has trouble making friends and finding her place.
Mudders' catcher Rudy Calhoun is having a bad season behind the plate until, at a yard sale, he buys a used catcher's mask that greatly improves his playing.
Bus Mercer, shortstop for the Peach Street Mudders, wants desperately to be picked for the county all-star team, but he breaks his parents' rules for riding his new bike, and feelings of guilt affect his game.