Yun Qingge is the most unpopular princess of the Chongqing Dynasty. Her strange illness of coughing up blood since she was a child is regarded as unlucky. Before her death, her mother-in-law gave her a piece of seemingly ordinary brocade silk, saying that it contained family secrets. When the marriage proposal came, she accepted it calmly, but she didn't know that someone in the court wanted her to die on the road. When the convoy encountered an avalanche and an assassin, she coughed up blood and dyed the brocade silk red, and unexpectedly appeared. The handwriting of the late emperor's secret edict; it turns out that the mother-in-law's family once mastered a secret that could subvert the imperial court, and Beidi Khan Helianlie was also related to it; she arrived at the Beidi royal court with surprise and found that the Khan was not tyrannical as rumored, but rather treated her with courtesy; the Khan's second brother Tuoba Huan was eyeing the tiger, secretly wooing the tribal leader; Yun Qingge used brocade silk Gradually piecing together the truth, she discovered that the powerful officials in the DPRK had colluded with Tuoba Huan; she reached a tacit understanding with the Khan to jointly fight against internal and external enemies; she was seriously injured in an assassination attempt to protect the Khan, and the blood on the brocade silk revealed a complete map, pointing to a cave where arms were buried; the Khan thus gained the opportunity to quell the civil strife, but Yun Qingge fell into a coma due to excessive blood loss; she woke up When she came, she found that she was imprisoned deep in the royal court. The position of Khan's princess was vacant, but Tuoba Huan's remnants were still there; she had to continue to use brocade and silk as a weapon to choose between love and conspiracy; in the end, she chose to write a letter of peace with her own blood in exchange for a hundred years of peace between the two countries; the brocade and silk were turned into ashes in her hands, and her life came to an end.