When Trish moves to Comity, Massachusetts, she discovers one of her new teammates on her baseball team is Ben, her math competition rival who she beat in the spring Math Puzzler Championships. Unfortunately, their team is terrible, and the kids are desperate to find a way to win. When their team sponsor Salty Snacks starts providing pre-game snacks, the team magically starts to improve. At the same time, Trish and Ben start receiving mysterious math puzzles that seem to also be improving the team's performance. They soon start to believe that they have to solve all of the puzzles in order to win the championships.