Vivy Cohen wants to play baseball. Ever since her hero, Major League star pitcher VJ Capello, taught her how to throw a knuckleball at a family fun day for kids with autism, she's been perfecting her pitch. And now she knows she's ready to play on a real team. When her social skills teacher makes her write a letter to someone she knows, she writes to VJ and tells him everything about how much she wants to pitch, and how her mom says she can't because she's a girl and because she has autism. And then two amazing things happen- Vivy meets a Little League coach who invites her to join his team, the Flying Squirrels. And VJ starts writing back.