Looped Thirteen Times, Maple Leaf Button Is Responsible for Seven Murders

The lights in the morgue buzzed like a cicada that refused to stop. Shen Zhiyao opened her eyes, the metal table was so cold that the back of her neck was numb. The third corpse had three parallel cuts on its neck. It held half a maple leaf in its left hand, with clear veins and slightly curled edges - exactly the same as the previous six.