Fifty-five years after the publication of "To kill a mockingbird", Harper Lee has published another novel. "Go set a watchman" was written before Lee's beloved masterpiece, as director Mary McDonagh Murphy explains in this update of her 2011 documentary Hey, Boo: Harper Lee & To Kill a Mockingbird. Her new up date of her film, sifts through the facts and speculation surrounding Lee and both her novels and include's interviews with Lee's sister and close friends.