Deep in the San Fernando Valley, behind the train tracks and amidst dilapidated warehouses, was rock n' roll's best kept secret. Sound City, America's greatest unsung recording studio, housed a legendary, one-of-a-kind recording console, and became the birth place to the seminal albums that defined 20th century music. Fleetwood Mac, Neil Young, Rick Springfield, Tom Petty, Nirvana, amongst many others, all put magic to tape within these walls. It was rock n' roll hallowed ground. Directed by Dave Grohl (Nirvana, Foo Fighters) and featuring interviews and performances by the iconic musicians who made their careers in the studio.