On a visit to Moe's, Homer has no money to pay for his beer and Moe will not give him any freebies. As a result, he goes around town trying other things to feel drunk, such as breathing thin air on top of a mountain, licking toads and giving blood. Moe feels guilty about refusing to serve Homer and gives him a free beer, but Homer is already heavily intoxicated. Moe, Lenny and Carl put Homer in taxi to take him home. In the cab he is secretly videotaped for a reality show called Taxicab Conversations, and says some unpleasant things about Marge and the kids, as well as revealing his dream of becoming a rock star. His family is not impressed with him, but soon realize that they do somewhat burden him. To make up for this, the family takes Homer to a Rock 'n Roll Fantasy Camp, run by the Rolling Stones. At the camp, Homer and a bunch of other Springfield citizens learn about rock music, from instructors Mick Jagger and Keith Richards, Elvis Costello, Lenny Kravitz, Tom Petty and Brian Setzer. Finally, the wannabe-rockstars have a mock rock concert, with Homer as the lead guitarist and singer.
When Homer learns that the camp is just a one-week only camp, he is bitterly disappointed and refuses to leave. Mick Jagger eventually placates Homer by offering him a chance to perform at a benefit gig, the "Concert for Planet Hollywood". An excited Homer gets passes for his friends so they can see him at the concert. Homer's glee turns to embarrassment when he is asked to perform the duties of a roadie. When he goes on stage to test the microphone, seeing his family and friends out there rooting for him, he sings a rock song and steals the show. This angers the rock stars, who attempt to run Homer off the stage with a big mobile fire-breathing devil's head. The devil's head goes out of control and plows into the audience.
The performers, feeling sorry about their actions, offer Homer an opportunity to perform at another benefit concert (for the victims of the recently messed-up gig), but he declines and prefers to perform at home instead. However, at the end of the episode he replaces his car with the big devil's head (given to him by the band) using it to take Bart and Lisa to school. Principal Skinner tells Homer that he is not allowed to stop his car in the school bus zone. In retaliation, Homer activates the devil's fire breath, burning off Skinner's clothes, much to the delight of the kids.