Music documentary on the california sound. It focuses on the laurel canyon area of los angeles, and how it came to be a hub for influential musicians such as the byrds, the beach boys, buffalo springfield and the mamas and papas. Presented by jacob dylan. Among those featured in the documentary are tom petty, brian wilson, stephen stills, david crosby, graham nash, michelle phillips, jackson browne, ringo starr, eric clapton, roger mcguinn, john sebastian, lou adler, jakob dylan, norah jones, beck, regina spektor, cat power, and others.     the film is presented by jakob dylan. Dylan journeys to those who wrote the iconic songs and uncovers never before heard personal details behind the recordings from those who made them popular.