Zhang Tianzheng, the son of a mountain walker, became stupid due to poisoning. He lived peacefully in Qingshi Village with his grandson Zhang Beichen. The appearance of the mysterious woman Duan Siyan broke the ordinary life of the grandfather and grandson. Zhang Beichen realized that he knew nothing about his grandfather. Duan Siyan, who was rescued by Zhang Beichen, came here to kill Zhang Beichen to avenge his parents, and also mentioned a tragic past event in Qimen, "The Change of the Golden Crow". The two reached a contract to find the truth of the past. Zhang Beichen decided to inherit his grandfather's rebirth blade, become a mountain walker, and solve the truth of his grandfather's poisoning. Since then, Zhang Beichen, the mountain walker, Duan Siyan, who is highly skilled in martial arts, Wei Ling'er, the heir of the ghost doctor, and Ma Tianhong, the northern horse, have embarked on a journey to find the truth. Along the way, they experienced various strange events. The four teenagers were brave and fearless, and solved these strange events one by one. They saw the greed, anger, ignorance and hatred in the world, and also felt the most precious feelings between people. But more often than not, these seemingly supernatural events are actually the result of the despicable nature of human hearts. As the saying goes, "There are no ghosts in the world, but evil is in the human heart." One thought can lead to heaven or hell. The four teenagers gradually approach the truth, and the mystery of their fathers gradually emerges. There seems to be a bigger conspiracy behind their grandfather's poisoning. The future of the four is still unknown...