When the daughter of a medical student left a research project to save her mother and was deceived into a deadly rule-based ghost story called "The Decameron," the chief medical examiner Qin Mingyuan tore up all the norms of the rational world and stepped into the abyss of his own initiative. Here, death is the only outcome and rules are the only logic. While others struggled to survive by luck or force, Qin Mingyuan leaned over and inspected the corpse in the ghost story - the displacement of the corpse's spots revealed the movement trajectory of the invisible killer; the microcontraction of the muscles revealed the triggering mechanism of mental pollution; the ice crystals of the blood pointed out the absolute way to survive in Blizzard Villa. He pointed the scalpel at the ghost story itself, using forensic medicine and trace examination to dissect every unsolvable "cause of death" inch by inch. When the final scene on the tenth day unfolded, Qin Mingyuan discovered that all survivors had become numbered "experimental subjects", and his daughter's memory was being quietly overwritten. This time, he must complete a silent counterattack without violating the ultimate rule of "quiet life", bring his daughter home, and issue a final death certificate to this cold "god" experiment.