It is summertime once again and the Camp Rock is on the brink of shutting down. When Mitchie and her friends Ella, Peggy, Tess, Shane, Nate, Jason and others are back to Camp Rock for another rocking summer they found the place empty. They found out that Brown’s high school greatest rival had established another camp just across the lake from Camp Rock location. Unfortunately, the rival camp is stealing all of the campers from Camp Rock and if Camp Rock doesn’t get back the campers soon, they’ll have to shut down permanently.

Meanwhile the son of the rival camp fall in love with one of Mitchie’s friend Tess which made the whole scenario worst when he goes over to the Camp Rock side. To settle the score Mitchie and her camp friends challenge the rival camp to “Jam Off”, and the losing camp has to shut down.