In the late Qing Dynasty and early Republic of China, there was turmoil and unrest, with rampant bandits and warlords, as well as crooked and unscrupulous ways. A series of murders broke out in Jiuhe Town, a small county town in the northwest of China. Many of the deceased died in strange and mysterious ways, and if they were harmed by evil forces, they caused a stir in the town for a whilePeople are in a state of panic, and everyone is in danger. The county constables San Geng and Qi Xi were ordered to conduct an in-depth investigation. Unexpectedly, red phosphorus powder, commonly known as Gu Mi Zi, was found on the body of the deceased and at the crime scene. This item is a commonly used prop by martial arts masters in the martial arts world,In order to seek clues, the two of them invited the Western Opera Master Xin Shifu, who was hidden deep in the mountains, to assist in solving the case. They also unexpectedly met the mysterious and privately investigated Little Play Master Bai Xiaobai. The two of them joined forces to investigate and gradually discovered a suspicious fateThe case seems to be related to a mysterious organization, and it leads to an old grudge about the cult organization "Lao Ke Er" that was already destroyed twenty years ago. The case becomes more and more complicated, as Lao Ke Er resurges,Several people involved in the investigation also encountered accidents one after another. The originally peaceful and peaceful small county town has been shrouded in a terrifying atmosphere created by a strange force and chaos.