A gripping saga set in 1960s Hong Kong, delving into the world of secret societies. This story unravels the secrets behind: The notorious Kowloon Walled City The Four Great Police Detectives (四大探长) The Four Major Triad Families (社团四大家族) The Eighteen Tigers of Kowloon (九龙十八虎) The Twelve Golden Hairpins of Mong Kok (旺角十二金钗) The rise and origin stories of legendary underworld bosses (风云大佬的发迹史). A Note on Names: For special reasons, all characters in this text are fictionalized and referred to by pseudonyms.