Set in a fictional country, based on Imperial China during the Tang Dynasty

Your a young person working as an apothecary in the red-light district, who is kidnapped and sold to the Imperial Palace as a servant. However, you still retains your curious and eccentric personality and plans to work there until your years of servitude are over, without drawing the attention of anyone. One day, after hearing rumors that the emperor's children are critically ill, you begins to investigate the cause, using your experience as an apothecary, and successfully solves the mystery of their illness. Even though you intend to remain anonymous, your actions eventually catch the attention of an influential eunuch, and soon finds yourself solving various mysteries for the royal court.