A sunshine of about 26 years old, a pure wedding dress designer working hard in Shanghai to strive for his dream, of course, accompanied by this failure, in the low point of his career, he has long endured other people ’s incomprehension, ridicule and even use, but he Still grateful. After repeated failures, he not only realized his dream of starting a business, but also moved others with his persistence, kindness, generosity and tolerance, and harvested his own love story.

The film is adapted from the chapter "Black Fox" in Gao Luopei 's novel "Celebrated Cases of Judge Dee".

In the late Qing and early Republic of China period, there is unrest, bandits and warlords wreaking havoc, and rampant crime. A series of murders breaks out in Jiuhe Town, a small county in the northwest of China, in which many died in strange and mysterious ways, as if they were harmed by evil forces. This causes panic in the town and puts everyone in danger. So, the county’s female constables, San Geng and Qi Xi, are ordered to conduct in-depth investigations. Surprisingly, red phosphorus powder, commonly known as Gumizi, is found on the corpses and at the scene of the murder. This powder is commonly used by magicians in the martial world as a prop. To seek clues, the two of them invite the Western magician Xin Shi Si, who is deeply hidden in the mountains, to assist in solving the case.

A murder and gold theft case leads Di Renjie to a deeper conspiracy when traces of Blood Vine, the Pink Butterfly and the Tree Demon are found at the crime scene. Dee is pestered by Shen Jun Yao, a flower girl, and runs into Jiang Hanshuang, a female officer who is investigating the murder of the Tree Demon and the gold theft.

Tells the story of Tang Yang who was entrusted by the heroine's father to protect the heroine Yang Yi's treatment pills from being snatched by criminals. In the face of extremely dangerous pursuit, he still protected Yang Yi without fear of danger, and fought against the villains with all his strength, and finally defeated the villain forces.