The Magic Detective: Thirteen Needles at the Gate of Ghosts

According to legend, the ancient medical secret needle "Thirteen Needles at the Gate of Ghosts" that has been passed down for thousands of years can save people from the ghost gate, and evil can control people as puppets. Everyone wants it, but it has long been hidden in the rivers and lakes, and no trace can be found. As the world gradually forgets the "Thirteen Needles of the Ghost Gate", a bizarre and unpredictable serial murder case involves the "Thirteen Needles of the Ghost Gate" and the secret sect of the Ghost Gate hidden behind it. The case becomes increasingly confusing. At the same time, Song Jingzhi, who was expelled from hell for murdering his mentor, inexplicably became the murderer of the serial murders while investigating the case. Faced with all kinds of irrefutable evidence, Song Jingzhi and the murderer behind the scenes launched a just battle involving life, death and redemption. At a critical moment, a disfigured old woman confessed to all the crimes. The mantis stalked the cicada and the oriole followed, both true and false. Who is the real murderer?