Sage Scott (Liamani Segura) and her younger brother Desi arrive at their first summer at Camp Rock, where they meet drummer Cliff (Casey Trotter), cellist Rosie (Lumi Pollack), and aspiring dancer Callie, among others. The reunited Connect 3 - Shane (Joe Jonas), Nate (Nick Jonas), and Jason Gray - are preparing for tour when Lark suggests they hold a competition at Camp Rock to find a replacement opening act. Sage is motivated to win Final Jam to kick off her music career, befriending Fletch Robinson (Malachi Barton) along the way, who joins Cliff's cabin and becomes an unexpected ally. As tensions rise and friendships are tested, Sage must navigate the challenges of the competition while keeping her secrets and desires hidden.