The two best friends, Grim and Axel, have ever since they were eight been dreaming about attending the annual Norwegian Championship of Rock. Together they have a band - Los Bando Immortale, but they lack a bass player, and Axel the vocalist and lead guitarist can’t sing. Grim hasn’t had the heart to tell him yet, but when they get accepted to the National Championship of Rock, he needs to find a solution – quickly. They hold an audition, but have no luck finding a suitable band member, so they have to let nine-year-old Thilda become their bass player – on cello. As their designated driver, they assign the local rally talent, Martin. What they don’t know is that he doesn’t have a driver’s license. They embark on a crazy journey across Norway. With the police and the parents chasing them, this will be a race against the clock to get to Tromsø in time for the event of their lifetime.