Movie Plot : The 1970s in Japan saw the rise of motorcycle gangs, which drew the interest of the media. The movie follows a member of the "Black Emperors" gang and his interaction with his parents after he gets in trouble with the police.The 1970s in Japan saw the rise of motorcycle gangs, which drew the interest of the media. The movie follows a member of the "Black Emperors" gang and his interaction with his parents after he gets in trouble with the police.