In order to find out the truth behind her mother's death in the palace, the concubine Su Mutang took the initiative to participate in the talent show and became a show girl. She accidentally bound the "Secret Palace Scroll System" left by her mother. The system releases tasks every night related to the cold palace, burial of bones, and secrets of the previous dynasty (such as "taking the copper box from the third room of the cold palace" and "asking the old eunuch Li Fei for details of her death"). Completing the tasks can obtain clues, props or skills. During Su Mutang's mission, he discovered that every step of the way pointed to the conspiracy of the Queen Mother Shen Qingyue. In order to hide the crime of poisoning the late emperor, the Queen Mother killed everyone who knew about it (including Su Mutang's mother). The emperor Xiao Jingheng appeared gentle on the surface, but in fact he had long been aware of the Queen Mother's abnormal behavior, and deliberately let the system guide Su Mutang to uncover the truth and use her to weaken the Queen Mother's power. In the end, Su Mutang completed the ultimate mission of "exposing the crimes of the Queen Mother", the Queen Mother was sentenced to death, Xiao Jingheng secured the throne, and Su Mutang became a noble concubine, took control of the real power of the harem, and became the new "boss". (Highlights: The missions connect suspense lines, and each step leads to the ultimate conspiracy; the protagonist's growth line from a concubine to a powerful harem boss reveals the emperor's hidden layout in a reversal.)
