Jiang Ning, the eldest princess of the Canglan Kingdom, is ruthless, cold-blooded, and utterly unpredictable. On the surface, she and her childhood sweetheart, Chief Councilor Xie Changyuan, are lovers, but in truth, they use each other, constantly playing a deadly game on the edge of a blade. She hates him because his aunt destroyed her family and left her with nothing. Then the gentle and refined top scholar, Lin Qingyan, enters their game carrying half of an ancestral jade pendant capable of commanding troops. Jiang Ning initially intends to use him to exact her revenge, but unexpectedly, his sincerity begins to melt her icy heart. As betrayal and deep affection become intertwined, will she drag him into the abyss or reach for the light he offers?