Hou Wanjun, the concubine of the Hou family, was forced to marry as a substitute. On the wedding night, she promised three years of freedom and used acupuncture to save the sick and frail prince Wang Kai. In the inner courtyard of the palace, she established herself with her medical skills, and he used her power to maneuver around the court. The silver needle sets not only a three-year period, but also two hearts unwilling to be manipulated by fate. When old secrets emerge, can this marriage that started as a transaction usher in a true marriage?
