On the eve of the wedding, the princess Song Yao was poisoned and died suddenly. In order to appease Beidi's anger, her personal maid A Yuan was forced to marry her instead, and embarked on the road to the grassland with a jade pendant engraved with "Chang Ning".
She thought that her enemy was the wind and frost on horseback, and the open and hidden arrows in the court, but she did not expect that the first person to see through her identity was Tuoba Yan, the second prince of Beidi - a man who had an old relationship with Song Yao and was both good and evil.
"You're not her at all."
"I know. I came here to find out how she died."
From the deep palace to the grassland, from the substitute to the princess, from the chess piece to the chess player. What she wants to seek for the young lady is not only justice, but also a truth that has been buried for three years - about the lives of 30,000 soldiers and the sin of an emperor.
