Eleven-year-old cousins who are closer than most brothers, catcher Liam McCarthy and pitcher Carter Jones grew up playing baseball together. Now, their team is on the verge of winning the greatest championship of all: the Little League Baseball World Series. To reach the title match, however, they must first beat their number one rivals from Southern California. Little do they know that the game will prove to be just the first challenge they'll face on their road to the championships.