"Midi City is a musical haven again after the last onslaught of evil and is ready to hold a brand-new concert. But the show turns dark when Dagger returns with some seriously strong allies. Who is the Queen of Darkness, and can she really destroy the world? Their only hope lies with the adorable members of Plasmagica! Swept from the real world and back to Sound Planet, Cyan reunites with her bandmates to face the growing darkness. But with new bands and new songs, the pressure to be the best is at its highest! Can everyone band together to take on the Queen of Darkness and put a stop to her devastating plans? Next, catch the adorable Show By Rock!! Short!! where your favorite bands are cuter than ever as they answer questions, riddles, and more."