At ten, Mingzhu was brought back to the Qi residence by her father, the top scorer in the imperial examinations, only to become a servant to her younger half-sister, Qi Mingyue. She went from being called “Mingzhu” to the servant “A Zhu.” At fifteen, the First Madam treated her as a courtesan, but the Crown Prince came to her rescue. To survive, she allied herself with the sinister Third Prince to approach the Crown Prince. As the truth behind her mother's tragic death, the Qi family's schemes, and the secrets surrounding the poisoning of two generations of emperors are gradually exposed, she refuses to let others control her fate any longer.