Legend has it that in the folk culture of Northeast China, animals with spirituality are called immortal families. During the chaotic period of the Republic of China, girls from Qingliu Village were frequently abducted and brutally killed by the Grey Immortal, and the entire Qingliu Village was invaded by evil spirits. Forensic expert Fang Tianyi is proficient in the art of exorcising evil and breaking through mysteries. In order to uncover the truth, he delves deep into the old forest of Northeast China to uncover the hidden mysteries.