She was an orphan of the Shen family who had been exterminated. She hid in the palace as the lowest medical girl, hoping to survive in a low profile. A Mid-Autumn Festival drug case forced her to show off her unique drug testing skills in public. From then on, the queen entangled her, the prime minister chased her, and the eunuchs monitored her. The three parties involved her - she wanted to uncover the truth about the massacre of her family eight years ago with her own hands in this cannibalistic palace.