Liu Xu'er, 16 years old, was originally a slave born in the Weaving House in Suzhou. Because she looked exactly like the late beloved concubine, she was secretly sent to the palace and became the lowest-ranking maid in the Clothing Bureau.
She was born with the ability of "photographic memory" and was extremely sensitive to smells (she learned to make incense from her mother when she was a child). This ability was initially ignored, but later became the key to solving the problem.
During the Xuande period of the Ming Dynasty, there was an undercurrent in the harem. Emperor Zhu Zhanji worked hard to govern but was frail and sick. Five forces, including the queen mother, empress, beloved concubines, eunuchs, and courtiers, set up a complicated chess game in the harem.
