Ah Xun never thought that she, an embroiderer from the south of the Yangtze River, would one day be bundled up in fine clothes and driven into a talent show car in the capital in place of a princess who had escaped from marriage. Her only mission is to act as a fake, be defeated peacefully, and then be picked up by her family and remain anonymous ever since. In order not to attract attention, she hid her embroidery skills, which she relied on for a living, and imitated the princess's imitation of a beauty, and became a transparent person in the palace. Until the big banquet in the Royal Garden, she accidentally showed off her double-sided embroidery, which shocked everyone. On the high position, Yan Hansheng, the 9,000-year-old man who held all the power and oversaw the country's governance, crushed the white jade cup in his hand on the spot. Everyone said that Yan Qiansui was crazy. He crossed her, the fake, off the draft list and imprisoned her in a private mansion, tracing the butterfly birthmark on her collarbone with his ice-hardened eyes every day. "Even the birthmarks are exactly the same. The people behind you have really worked hard." He stroked her neck and said in a serious tone, "It's a pity that the real one was strangled by the governor himself three years ago." Ah Xun was scared to death. She knew that through her, he was looking at another dead soul - the fiancée he executed with his own hands. She is living proof of his sin, an inner demon that he cannot escape. While he loathed her face, he was morbidly fascinated by this false phantom. But Ah Xun just wants to live and escape from this prison. She must find out what happened three years ago and who is the woman with the same birthmark as her!