Modern forensic doctor Shen Zhou transmigrates into a paper-doll shopkeeper, casually saving A Ye, the fierce-eyed little mute girl on the street who can crush green bamboo with one hand. Cloaked in the guise of "communicating with yin and yang," he uses modern forensic medicine to deliver a dimensional strike against feudal suspended cases: a red umbrella illuminates bones to cut down life and death, and mechanical paper dolls frighten corrupt officials into madness. Until a major capital case erupts, he uses a single needle to pierce the marquis manor's conspiracy, only to realize with a start that the little wolfhound staying step-for-step by his side is actually the true eldest daughter of the marquis manor who drifted among the common folk and was framed by others! With deep hatred avenged, facing a hall full of wealth, the girl instead spurs her horse through the cage in the torrential rain, throwing herself fiercely into his arms and crying tremblingly, "I don't want to be an eldest daughter, I only want my Shen Zhou!"