This Is Spinal Tap is a mock documentary following the fictional British rock band Spinal Tap as they embark on an American tour in support of their latest album. Once considered rock icons, the group now faces dwindling audiences, internal tensions, and a series of ill-fated promotional efforts. As the tour unravels—equipment mishaps, poorly planned gigs, and personal conflicts—the film blends dry humor with sharp satire, revealing the fragility of fame and the absurdities of the music industry. The story is presented through interviews and behind-the-scenes footage, offering a grounded, comedic look at a band struggling to remain relevant.