Anya and her older sister, Marina, used to be an unbeatable catcher and pitcher duo on the Geckos, a slow-pitch softball team, but now that Anya has joined Marina on the girls' fast-pitch team, they struggle to get along. Anya can't stand Marina's know-it-all attitude, and Marina thinks Anya doesn't take things serious enough. When their team's main catcher goes to play with another team for a few games, Anya steps in to be their back-up catcher....