The bat-only punk rock band "Flying Blind" has a dedicated following of other nocturnal music lovers. Their screechy sound really meshes with sonar hearing. While on tour to expand its fan base, Flying Blind stops at the Grumpy Woods for a midnight show. Soon tons of rock fans are keeping everyone awake at night! But when the bears start jamming with the band, its sound changes, driving away the crowd. This time it's Opal Owl who saves the day - and returns some peace and quiet to the woods.