Who's this black guy trying to make friends with the Ku Klux Klan?" A raised eyebrow, a shake of the head. Such were the sentiments of Scott Shepherd, a former Klan grand dragon, when he first saw Daryl Davis, a piano-playing bluesman who travels the nation attempting to dispel racism from those who hate him most. It doesn't often work, but over the decades Davis, like a man on a quixotic pilgrimage, has collected more than two dozen Klan robes from those who have disavowed white supremacy. His unlikely story unfolds in "Accidental Courtesy," a documentary by Matt Ornstein that follows Davis on an odd and lively quest to Confederate monuments, Klansmen houses, boogie joints, churches and a hot dog stand. "How can you hate me when you don't even know me?" Davis asks in the film, which opens in Los Angeles on Friday. "Throughout my life I have been looking for an answer to that." The son of a foreign service officer, Davis spent part of his childhood overseas, far from the racism many African Americans learn early. His first encounter with bigotry came when he was a 10-year-old Cub Scout. Bottles and rocks were thrown at him as he marched in a parade. The bewildering incident was the seed of a mission that years later found him ... starting a conversation with Klan Imperial Wizard Roger Kelly. The two became close. When Kelly quit the Klan, he gave Davis his robe. Talking to Klansmen "has worked for me," said Davis. "I don't seek to convert them but if they spend time with me, they can't hate me."