Rebecca Zamolo is on a mission to save her summer. Instead of going to camp like shed planned, shes been stuck in summer school. But today is the day! Shes going to present her final science assignmentusing her Nanas borrowed vintage zoetropeand then shell be free to have fun. But as Becca and her classmates wait for her teacher to arrive, a menacing voice comes over the intercom claiming to be the Game Master! The kids quickly discover that the Game Master has locked the doors, scared off the teachers, and made it clear that if Becca and her friends dont solve the clues that have been left behind, theyll never get back Beccas irreplaceable zoetrope, never finish summer school, and never get to enjoy whats left of their summer vacations. Becca doesnt know who is behind this, but she wont let the Game Master win.