In Venice Beach, naive Midwesterner JB bonds with local slacker KG and they form the rock band Tenacious D. Setting out to become the world's greatest band is no easy feat, so they set out to steal what could be the answer to their prayers -- a magical guitar pick housed in a rock-and-roll museum some 300 miles away.
In 1975, San Fernando Valley teen Joan Larkin reinvents herself as Joan Jett, a guitarist who wants to form an all-girl punk band. She pitches the idea to a sleazy manager, Kim Fowley, who pairs her with a drummer and then searches for a face: he finds Cherie Currie, at 15 the perfect jailbait image for his purpose; by luck, she can sing. Two others round out the band, "The Runaways." Fowley books a tour, signs them to Mercury Records, and packs them off to crowds in Japan. Seeds of conflict sprout early: Fowley puts Cherie front and center in the publicity, she's soon strung out on pills and vodka, and jealousies arise. Without adult supervision, where can Joan and Cherie end up?
In Connecticut, lonely widowed Professor Walter Vale has a boring life. He teaches only one class at the local college and is trying to learn how to play the piano, despite not having the necessary musical talent. Walter is assigned to attend a conference about Global Policy and Development at New York University, where he is to give a lecture about a paper on which he is co-author. When he arrives at his apartment in New York, he finds Tarek Khalil, a Syrian musician, and Zainab, a Senegalese street vendor, living there. He sympathizes with the situation of the illegal immigrants and invites the couple to stay with him. Tarek invites him to go to his gig at Jules Live Jazz. Walter is fascinated with his African drum and Tarek offers to teach Walter to play the drum. However, after an incident in the subway, Tarek is arrested by the police and sent to a detention center for illegal immigrants...
Robbie Hart is singing the hits of the 1980s at weddings and other celebrations. He also can keep the party going in good spirit, he knows what to say and when to say it. Julia is a waitress at the events where Robbie performs. When both of them find someone to marry and prepare for their weddings, it becomes clear that they've chosen wrong partners.
In 1982 legendary British heavy metal band Spinal Tap attempt an American comeback tour accompanied by a fan who is also a film-maker. The resulting documentary, interspersed with powerful performances of Tap's pivotal music and profound lyrics, candidly follows a rock group heading towards crisis, culminating in the infamous affair of the eighteen-inch-high Stonehenge stage prop.