"This Is Spinal Tap" shines a light on the self-contained universe of a metal band struggling to get back on the charts, including everything from its complicated history of ups and downs, gold albums, name changes and undersold concert dates, along with the full host of requisite groupies, promoters, hangers-on and historians, sessions, release events and those special behind-the-scenes moments that keep it all real.

When the owner of a struggling used car lot is killed, it's up to the lot's hot-shot salesman to save the property from falling into the hands of the owner's ruthless brother and used-car rival.