Shi Liaoliao is a transmigrator who finds herself inhabiting the body of a cross-dressing manservant in a fictional romance novel. Tasked by a system named Wanwan to fulfill the role of the original butler and facilitate the romance between the male lead, Lu Yanzhou, and the female lead, she must navigate the treacherous environment of the wealthy Lu family. Her primary goal is to complete her mission and return to her original world, but she faces immediate hostility from Bai Liye, a gold-digging socialite who views Shi Liaoliao as a rival for Lu Yanzhou's affection and wealth.
Lu Yanzhou, the sole heir to the Lu family, possesses the ability to read minds, a secret he keeps hidden from everyone, including his estranged father, Lu Tingfeng. Lu Tingfeng has secretly assigned Shi Liaoliao to spy on his son, creating a complex web of mistrust. When Lu Yanzhou discovers he can hear Shi Liaoliao's inner thoughts, he realizes she is not the loyal spy he believes her to be, but rather a sarcastic, unconventional individual who constantly mocks him internally while maintaining a stoic exterior. This revelation shifts his perspective, leading him to protect her from false accusations and social ostracization at Saint Dun Academy, an elite institution with a rigid hierarchy.
The core conflict arises from the misunderstanding that Shi Liaoliao is a spy sent by Lu Tingfeng, while she is actually trying to avoid detection to complete her mission. Bai Liye attempts to ruin Shi Liaoliao's reputation by spreading rumors about her sexuality and loyalty, but Lu Yanzhou consistently intervenes, partly due to his curiosity about her true nature and partly because he finds her inner monologue entertaining. Shi Liaoliao also encounters Gu Xuezhao, a scholarship student disguised as a boy, who bears a striking resemblance to the expected female lead, adding another layer of confusion to the narrative.
As Shi Liaoliao adjusts to life at Saint Dun Academy, she must balance her duties as a manservant with her identity as a scholarship student. She faces bullying from higher-ranking students but gains Lu Yanzhou's protection, which complicates her efforts to remain inconspicuous. The story follows her attempts to survive the hostile environment while waiting for the female lead to appear and trigger the necessary plot points for her return home. Meanwhile, Lu Yanzhou becomes increasingly intrigued by Shi Liaoliao's dual nature, leading to a gradual shift in their relationship from master-servant to something more ambiguous. The narrative explores themes of identity, loyalty, and the subversion of traditional romance novel tropes, as both characters navigate a world where appearances are deceptive and true intentions are hidden beneath layers of social expectation.