Natalie and Pippa are the perfect doubles team. After years of training, the two sisters are set to win the most prestigious tennis tournament of their young careers. For Natalie, it's the start of her dream to become a professional athlete. For Pippa, it's the chance to prove she's more than just a pretty face. But the night before the semifinals, Pippa is mysteriously attacked, leaving her unable to compete. Natalie is suddenly playing with a new partner: her worst enemy, the backstabbing, boyfriend-stealing Madison. And as if that isn't enough, someone is leaving Natalie threatening notes, warning her that she's next. In a world of intense competition, Natalie must now fight for her life while also trying to win the championship.