Ning Xiurui promised to protect the safety of the elders of the officials and persuaded them to prove Su’s innocence, but the officials died in prison the next day, leaving a key clue before dying. Su Yinyin saw the black dragon from her childhood again. Although she believed that the black dragon was here to marry her, she hoped that Ning Xiurui was the black dragon. Mo Chengfeng used the clues of the case as bait, and both inside and outside were ready to assassinate Ning Xiurui. Li Ji was ordered to protect Su Yinyin with Tang Linlin, but Su Yinyin was summoned to Ning Xiurui because of Ni Lin. In order to save Su’s father, Ning Xiurui specially added an authentic piece of “The Blue Dragon Returning to the Sea” and returned it to the palace.