The modern Jiangnan city (with the fictional "Linjiang City" as its core) appears to be a prosperous commercial city, but in fact it hides the game between ancient martial arts families, secret forces and world-protecting organizations.
Linjiang Luo Family (the heroine's family, represented by a traditional Chinese medicine family, with ancient martial arts inheritance as its core, has declined in recent years), Northern Iron Cavalry League (mainly engaged in logistics and security, controlling underground forces in the north), Lingnan Su Family (good at agencies and intelligence, keeping a low profile)
Hidden forces: Overseas Green Shark Island (making profits through smuggling and assassination, coveting the resources in the south of the Yangtze River), the Ghost Doctor Sect of the Western Regions (controlling people's hearts with strange medical skills, secretly planning)
