In the 17th year of the Republic of China, the Yellow River was on its old course. A hundred years of drought has revealed the sunken traces on the river bottom. Corpse fisher Chen Jiuhe patrolled the river on his first night and fished out a female corpse in costume - the corpse floated upstream with a lifelike face. The ancestral "Three Rules for Retrieving Corpses": Do not retrieve floating corpses for more than seven days, do not retrieve women in red, and do not retrieve faceless people. All of them were broken that night. Since then, corpses have surfaced one after another, each pointing to the night when the whole village suffered collective amnesia twenty years ago. Listening to the water to identify corpses, detecting hooks, and stabbing nails in rivers, Chen Jiuhe relied on the secret techniques of ancestral corpse removal and the unforgettable "Book of Life and Death" to reason step by step. Every time he picked up a corpse, he pieced together a piece of the truth: What was erased from the memory of the whole village was not a disaster, but a crime that the whole village conspired to sink. What sank to the bottom of the river was not an ancient tomb, but the entire theater troupe that was wiped out by the sinking river. The respected village chief Zhao Dehai used the pretext of rebuilding the river temple to cover up the evidence of the shipwreck. On the day of the big sacrifice, Chen Jiuhe stepped onto the altar wearing a plain white corpse recovery suit and untied the knot left by his father in public - the ironclad evidence was solid, and the innocent souls of the troupe were finally sacrificed. The true origin of the "Three Rules for Retrieving Corpses" was also revealed: they were the three sealing orders set by our ancestors to keep the secrets at the bottom of the river.