Introduction: A heroine living in a slum at the bottom of the empire, in order to save her mother from huge medical expenses, she accepted a special job - becoming a "contracted substitute" for the runaway young lady of a wealthy family. She was forced to take the place of the eldest lady in the royal concubine selection that narrowly escaped death. Originally thought to be a certain death game, the heroine relies on her top-notch observation skills and high emotional intelligence developed through hard work at the bottom. In a palace full of high-tech surveillance and ancient strict hierarchical systems, she goes from being a "fake" who may be executed at any time to getting through. She took advantage of the conflicts between the concubines and used the emperor's psychological defense to attack her heart step by step. When the real daughter returned and tried to expose her, she completed a desperate counterattack. In the end, she not only secured her position in the back, but was not only the emperor's "canary", but became the ruler who governed the interstellar empire side by side.
