Twelve-year-old Trish can solve tough math problems and throw a mean fastball. But because of her mom's new job, she's now facing a summer trying to make friends all over again in a new town. At her first baseball practice, Trish realizes one of her teammates is Ben, the sixth-grade math prodigy she beat in the spring Math Puzzler Championships. Everyone around them seems to think that with their math talent and love of baseball, it's only logical that Trish and Ben become friends, but Ben makes it clear he still hasn't gotten over that loss and can't stand her. When a mysterious booklet of math puzzles claiming to reveal the "ultimate answer" arrives in her mailbox, Trish and Ben start to get closer and solve puzzles together.