On the eve of the first day of school, Brady and McKenzie celebrate the day they met and reminisce about the summer, while they watch Brady's favorite movie, ''Wet Side Story'', the 1960s musical film that they got stuck in during the events of ''Teen Beach Movie''. Mack dismisses Brady's fear that their relationship will change when they begin school. Mack then notices she lost the necklace she received while in ''Wet Side Story'''s universe.