The unfavored legitimate son of the Duke's mansion, Ye Yunting, is married off to Prince Yong'an, Li Fengqi, by a royal decree. Prince Yong'an, who guards the northern frontier and has slain countless enemies, is the undisputed war god of Beizhao. However, when Ye Yunting marries him, the war god is already severely poisoned, his meridians shattered, clinging to life in bed. Ye Yunting, with a heart turned to ashes, marries him and, fearing the war god's fearsome reputation, hides in his courtyard, merely surviving. Not long after, he mistakenly drinks the poisoned soup intended for Prince Yong'an and meets his end. Before his death, the supposedly dying Prince Yong'an kneels by his bed, holding his hand and solemnly promising: "You lost your life because of me. From now on, I will do everything in my power to protect your family. Go in peace." Later, when Prince Yong'an ascends the throne, he fulfills his promise, protecting Ye Yunting's only family. Reborn, Ye Yunting still cannot escape the fate of being married off to Prince Yong'an as a ceremonial bride. But this time, he decides to take good care of this dying man, repaying the kindness from his past life. Unexpectedly, after the man detoxifies, he eagerly claims Ye Yunting as his own. Held tightly in the man's arms, Ye Yunting is reassured: "Stay with me in peace. From now on, I will protect you."