The smart and witty Wei Yingluo enters the palace as a seamstress to find the truth behind her older sister’s death. Believing the imperial guard Fucha Fuheng to be her sister's killer, Yingluo purposely attracts the attention of his sister the Empress Fucha, and is successfully transferred to Changchun Palace as a maid. Over time, she learns that the Fucha siblings are honest and kind-hearted people, and also develops romantic affections for Fuheng.
Mildly- in the first few episodes the protagonist must pretend to be mentally disabled to escape from an antagonist. The antagonist still treats the character somewhat badly. Later, another antagonist is treated in a way that causes them a permanent mental breakdown.