Baseball is no longer fun for the kids in the Waterfalls youth league after the playoff game ends in an ugly argument among parents and coaches. The players leave the ballpark in shame, but big George Starr kicks at the ground and everything changes.
An amazing adventure begins as they discover a magical world underground, Down Home, and encounter strange and magical beings who help them play better and have fun. Trouble begins, however, when several players break the rules of this new world.
An intruder presents them with a far greater challenge. Can they stop this trespasser and save Down Home without breaking even more rules and risking permanent banishment.