The story of John Lennon's album Imagine, released in 1971, exploring how the art, politics and music of the pair are intrinsically entwined. Featuring interviews with Yoko Ono, Julian Lennon, David Bailey, John Dunbar, Dan Richter and Eddie Veale, some of whom have never spoken publicly on film before, as well as previously unseen footage of Lennon and Ono from their private archive