In the mist and rain of the Jiangnan water town, there are unknown shadows. She hid in the market and repaired ancient books as a profession. When her fingertips brushed the yellowed pages, she could always touch the lingering warmth between the lines. A bronze pendant engraved with a lotus pattern unexpectedly shattered the peaceful life, and a series of murders followed. Strange tokens were left around the deceased - half a lotus petal, a withered bamboo knot, and a faded silk flower.
Each token is a puzzle, connecting an old case of family murder ten years ago. She followed the clues and discovered that behind the case was a web of power and desire, as well as the darkness and struggle deep in human nature. Under the green light, the fragments of ancient books hide mysteries. Everyone in the city has their own thoughts, and those tokens that symbolize obsession and sin are pushing her to the center of the truth step by step. When the mist and rain cleared and the old case surfaced, she realized that she was already in the middle of the situation, and every decision she made was related to life, death and morality.