As a poor concubine in the prime minister's house, Mo Yue became a spy for the fifth prince Song Hanshan in the prime minister's house at the age of thirteen in order to survive.
It seems that the fifth prince did not trust Mo Yue, so he did not issue any tasks for three years. However, when Mo Yue turned sixteen, the fifth prince seemed to have the idea of marrying with the Prime Minister, and frequently ordered Mo Yue to get close to his sister.
Mo Yue's biological mother Cui Niang was once the maid of the imperial concubine. In order to protect the imperial concubine, she was tricked into becoming a concubine. Once something happened, the imperial concubine fell into decline and committed suicide in the cold palace, leaving only the infant princess. Aunt Cui is outside the palace, but she is always thinking about the little princess who is one year younger than her daughter. She warns Mo Yue every day, "Once a slave, you will always be a slave. You must help the princess if you have the opportunity."
Concept: The heroine cannot stand being manipulated and resists secretly