At the end of the Jin Dynasty, the political marriage between Prince Xiao Yunqu and Shen Nazhi, the legitimate daughter of the Marquis of Zhenbei, opened the bloody curtain of the game between the orphans of the previous dynasty and the imperial power. The two went from testing each other to breaking the situation side by side. In the turbulent court, they not only had to protect their own secrets, but also had to fight against the triple threats from the imperial power, foreign enemies and old forces. In the end, half a piece of jade was used as a guide to uncover the truth about the regicide case twenty years ago and reshape the dynasty.