If you listen to 1970s pop music, you’ve undoubtedly heard these guys play, but do you know their names? This documentary highlights five talented men—Danny, Leland, Rus, Waddy, and Steve— who shunned the spotlight for themselves yet enjoyed decades of success as session musicians on iconic tracks. Interviewees include their collaborators James Taylor, Don Henley, Lyle Lovett, Jackson Browne, Phil Collins, Carole King, Stevie Nicks, Keith Richards, Steve Jordan, and dozens more who take us behind the scenes on the songs that shaped an era.