Luo Xuexin, the youngest medical fairy in Daxia, accidentally traveled through time and became a surrogate pawn of the Prime Minister's Palace. Instead of the eldest lady Luo Xuexin, who would rather die than marry, she married the cold and cruel regent Jinglin, who was blind and poisoned. She hid her sharp edge and used the secret technique of golden needles to secretly treat Jinglin's eye diseases and old illnesses, and gradually gained a foothold in the Regent's Palace. In the deep palace, the Queen Mother Song colluded with foreign enemies and pressed forward step by step. The mysterious national master Ling Wudao appeared with his secret to stir up the court situation. The two went from testing and suspicion to trusting each other. She relied on her medical skills to overcome many crises, and he used his authority to protect each other. They walked side by side in the undercurrent of power and intrigue, and their feelings quietly emerged as they got along.