Modern woman Su Tang transmigrates into a prince's mansion, with no desire to compete for favor and only one wish: to protect her daughter. Open-minded and gentle, she treats the children in the household with kindness and forms a close bond with the unfortunate Yun Lewen. As border wars and palace upheavals unfold one after another, Xiao Jingrong ascends the throne, and Su Tang enters the palace as a low-ranking Cairen. Though noble-born consorts look down on her, she remains gentle and accepting toward the lonely Prince of Longevity. As time passes, Xiao Jingrong develops genuine feelings for her. When Su Tang unexpectedly becomes pregnant, having witnessed women die in childbirth, she confronts the emperor with her fear of giving birth and asks him to treat their unborn child kindly. At the end of the season, a marriage delegation from the Chiman tribe arrives in the capital, setting off a new wave of palace intrigue.