“Linda, Linda, Linda” is the title of a hit song by the legendary Japanese rock band The Blue Hearts, which the girls in the school band decide to cover for the music festival. And that’s when the problems begin… Just three days before the festival, the band is on the verge of breaking up. The culprits: a broken finger and a hot temper. Desperate to find a way out of their predicament, Kei, Kyoko, and Nozomi meet a Korean girl named Son and convince her to become the band’s lead singer. The final rehearsals are a frantic mess: the girls feel like nothing is going right and that failure is inevitable. But the young artists’ efforts are not in vain.