Before Iraq, before the Bush Administration, before the Dixie Chicks, Bruce Springsteen and Pearl Jam... there was John Lennon, the celebrated musical artist who used his fame and fortune to protest against the Vietnam War and advocate for world peace. Filmmakers David Leaf and John Scheinfeld trace Lennon's metamorphosis from lovable "Moptop" to anti-war activist to inspirational icon as they reveal the true story of how and why the U.S. government tried to silence him.