According to legend, the "Qianmen" was founded by Fuxi. It has evolved and developed throughout history, forming various schools and factions, including gambling, deception, disguise, hypnosis, Chinese magic, etc. It was most prosperous during the Republic of China. The skills of the "Qianmen" were not passed on to outsiders until a young man in the school began to uncover the causes and effects of various things in order to avenge his father's murder. Only then did the world suddenly realize it. The story takes place in a "no man's land" during the Republic of China, where all kinds of people gathered, like a small undercurrent of rivers and lakes. Because of a bizarre case, three young people of different identities came together and began the process of "forming a group" to solve the case. Since then, a series of supernatural and bizarre cases have followed one after another, and all kinds of bizarre people have appeared on the stage, and the mysterious power hidden behind all the cases has slowly surfaced.