One night, an uninvited guest Jun (played by Wang Baoqiang) came to the police station. He reported to the on-duty detective that he had killed five people, but he could not tell the relationship between him and the victims, nor could he describe the process or location of the victims' murder. It turned out that he only planned to kill five people. The detective expelled Jun after writing down Jun's contact address. In the eyes of the detective, he was just a boring mentally ill person. But soon, a homicide occurred in the area where Inspector Han (played by Liu Qingyun) was stationed: the deceased was in a horrible shape. Han believed that this method of execution had an unusual motive. Less than a week later, Han took over another homicide case. The deceased was also a man who died in an abandoned machinery workshop. His death was very cruel. The deceased's feet were forced to wear small-sized red high-heeled shoes, and more than ten iron nails were nailed on the upper and sides of the feet. When Han was checking suspicious people and cases in Hong Kong, he saw the record of Jun coming to surrender that day. Han immediately led the team to search Jun's residence, but the house was empty, and there was nothing suspicious except a large number of old fairy tale books. But at this time, Han did not know that a large and precisely designed net had been opened, and the ending was even more incredible and unpredictable.