Terror strikes at a recently re-opened summer camp as each of the counselors is stalked by a violent killer.

When Mitchie and her friends return for a second summer at Camp Rock, a new rival music camp across the lake, Camp Star, challenges them to a battle of the bands with the loser closing down for good.

Princess Courtney, a modern princess, has her world turned upside down when she switches places with Erika, a famous rock star. Two very different worlds collide when a mix-up sends Princess Courtney to Camp Pop and Erika to Camp Royalty. While the leaders of the rival camps try to correct the mix-up, both Courtney and Erika learn to adjust to the different worlds and have fun while making new, unexpected friends.