The Horse Immortal: It is said that in the Northeast, people call spiritual animals immortals. During the turbulent times of the Republic of China, girls in Qingliu Village were frequently kidnapped and killed by gray immortals, and the entire Qingliu Village was invaded by evil spirits. Forensic doctor Fang Tianyi is proficient in the art of exorcising evil spirits and breaking the mystery. In order to find out the truth, he went deep into the old forest in Northeast China to uncover the dusty mystery.