Yu Qiu will always remember that late autumn that changed her destiny. When his parents became vegetative due to an accident, he was forced to put down his poetry manuscripts in the Chinese Department and look for salvation in chemical formulas. Ten years later, this middle school teacher witnessed the bizarre death of his high school classmate Yun Mengyao in the church - the bride was wearing a white wedding dress, hanging on a swing, with arsenic remaining in her stomach and scattered black roses, drawing him into a mystery woven with bloody maple leaves.
The appearance of criminal police captain Ji Mozhou brought Yu Qiu's dusty professional knowledge to light. As the investigation deepens, mysterious "maple" marks follow: from the letters secretly embroidered on the deceased's wedding dress to the chemical clues deliberately left by the murderer, every detail tells the existence of a huge organization. And when Yu Qiu discovered that the leader of "Feng" was actually the benefactor of his adoptive parents, the balance of family affection and justice began to shake violently.
The cases are intertwined like the veins of a maple leaf: the art of death in the form of crystalline potassium permanganate, the fatal invitation hidden in the wedding candy, and the college classmate with similar scars to him... Yu Qiu traveled between the laboratory and the crime scene, using chemical equations to decipher the code of human nature, but he did not know that he had already become a key piece on the chessboard of the "Maple" organization.
The color of blood and the fragrance of ink flow in the long scroll, and the truth and lies wax and wane in the autumn mist. When the last maple leaf falls, Yu Qiu must make a choice between saving his parents and revealing the truth - and the answer he is looking for may have already been engraved in the veins of the leaves stained red with blood.
Concept: The value of family affection and the cheapness of human hearts