Synopsis：Yu Zao, a modern young woman with a background in psychology, is transported into a novel and becomes a young eunuch serving in the Hall of Mental Cultivation. Disguised as a man, she does everything she can to keep her true identity hidden and stay alive. By a twist of fate, the tyrant emperor He Huaijing, who has been drugged with an aphrodisiac, discovers that she is actually a woman. From then on, she serves at his side, constantly living on edge. Scarred by childhood trauma, He Huaijing suffers from dissociative identity disorder, with a cruel and suspicious personality alternating with one that is gentle and endearing. Using her knowledge of hypnosis and her quick wit, Yu Zao outsmarts the Empress Dowager and Consort Shu while helping the emperor heal his psychological wounds. She rises from a lowly eunuch to the emperor's most trusted confidant, ultimately helping him secure his throne and overcome his inner demons. Along the way, their relationship grows from mutual suspicion into true love.