Screenwriter David Mament's script combines real people with fictional characters in an attempt to portray the important people in Jimmy Hoffa's life. Danny DeVito's and Armand Assante's characters are actually composites of numerous Hoffa associates. Director-Co-star DANNY DeVITO's unforgettable epic stars JACK NICHOLSON as Jimmy Hoffa, the legendary Teamster boss whose mysterious disappearance has never been explained. The film traces Hoffa's passionate struggle to shape the nation's most influential labor union, his relationship with the Mob, and his subsequent conviction and prison term at the hand of Robert Kennedy.