Melissa has a bad case of sibling rivalry, only her competition is a fictional character in her father's best-selling novel about a teenage super spy. When her father is "dadnapped" by a group of overzealous fans, it's up to Melissa to help him by tapping her inner superhero.

Troy, the popular captain of the basketball team, and Gabriella, the brainy and beautiful member of the academic club, break all the rules of East High society when they secretly audition for the leads in the school's musical. As they reach for the stars and follow their dreams, everyone learns about acceptance, teamwork, and being yourself.