Motivated by her love for the game and inspired by the legendary Jackie Robinson, Mamie Johnson is determined to be a professional baseball pitcher. But in a sport that's determined by white men, there is no place for a black woman. Mamie doesn't give up-from the time she insists on trying out for the all-male, all-white Police Athletic League until she realizes her dream and becomes one of three women to play in the Negro Leagues. Mamie Johnson's life shows that with courage and perseverance one can overcome even the greatest challenges.