It tells the story of Gu Mingzhu, the legitimate daughter of the Hou Mansion, how she survived in the crisis-ridden Hou Mansion after her mother died young and gradually grew up to become the mistress of the Hou Mansion. She has a complicated emotional entanglement with her concubine Shen Yu, and has a fierce power struggle with Mrs. Qin, the old lady of the Hou Mansion. As the plot progresses, the conspiracy above the court gradually emerges, and the fate of the Hou Mansion is closely linked to the fate of the country. In the end, Gu Mingzhu relied on her wisdom and courage to protect her family and find her own happiness.