The Piano Man opens up to PEOPLE in this week's cover story about the revealing new documentary 'Billy Joel: And So It Goes' ...

At one point, [Billy] said to me, 'You going deep?' And I said, ‘Yeah, and you know you’re going to go deep too,'" the film’s co-director Susan Lacy says.

Starring: Wet Leg, IDLES, Fcukers, The Charlatans, Soulwax, Daniel Avery, Dub Narcotic Sound System, Living Hour, Water From ...