Cordelia the accordion, Trey the triangle, Kaylee the ukulele, and Zook the kazoo meet when they're assigned to Bunk J--nicknamed "Junk Bunk" by the other instruments. Despite their differences, they'll have to become fast friends as they explore the wonders and challenges of the camp, including experiences with nature, food fights, and camp pranks. Can they learn to be in tune with each other by the time the big relay race comes around?