Watch VoirFilms. The docudrama Lone Wolf follows the life and combat experiences of RAF fighter pilot Josef František. Director Ondřej Veverka presents the story of a pilot who made his name whilst serving with the RAF’s 303rd Polish Fighter Squadron during the Battle of Britain. The film portrays Josef František not only as a flying ace with eighteen aerial victories during the Battle of Britain, but also as a man plagued by inner doubts yet possessing exceptional courage.