Disney Channel musical sequel in which Ross Lynch and Maia Mitchell reprise their roles as a teenage couple. Having previously found themselves trapped inside Brady (Lynch)'s favourite film 'Wet Side Story' during their summer holiday, he and girlfriend Mack (Mitchell) are now back in the real world. However, they become distracted when they return to school and decide they may be better off breaking up at least until next summer. But when characters from the movie, including the leads Tanner (Garrett Clayton) and Lela (Grace Phipps), turn up in their world they have to work together to get the cast back to where they belong. Brady and Mack come to realise that if they don't succeed the movie that brought them together might not exist, meaning they won't have ever met...