Water mark mystery
The rain in Linyu City always brings an indelible haze. Former criminal police officer Lu Chen has long been away from the police force, but he is dragged back into the abyss by a rainy night commission - History professor Chen Yan is missing. Behind his wife Su Mei's request for help are two corpses from an abandoned grain station, a magnolia pendant knife stuck in his chest, and a strange water mark.
This trace of water connects all the mysteries like a curse: the three unknown corpses in the fire at the grain station ten years ago, the remains at the scene where partner Lin Zhou died in the explosion three years ago, the old archives of human sacrifices of the "Water God Sect" in the 26th year of the Republic of China, and the ceramic bowls and magnolia flowers that must be found next to each corpse. When the secret of the Eastern Suburb Water Tower was revealed, and the truth about the "ten-year sacrificial cycle" of the "descendants of the Water God Cult" came to light, Lu Chen discovered that he had already been the last sacrifice in this conspiracy.
There are floating corpses in the moat, the assassination of an ancient book restorer, and the theft of police files. Side cases are nested layer by layer, and every clue points to the ultimate secret of the "Water God Cult Secret Book." And is that water mark that always squirms in the dark the mark of the murderer, or is it the last distress signal of the deceased? Lu Chen must find out the real manipulator behind the scenes before the rain stops, otherwise the next water mark will be engraved on his name.
