After Xie Qingyuan, the eldest daughter, lost her mother, she endured the hardships of her stepmother to survive. The stepsister Xie Yunwan is dressed in beauty, but she hides a delicate heart. During a palace banquet, the fate of the two sisters was intertwined. One entered the game and became the queen's dark blade, while the other accompanied the king into the whirlpool of the empire. When the family was overthrown and the imperial power oppressed them, they went from competing to relying on each other, working step by step, and finally both stood at the top of power. Only then did they realize that the world was at stake, and they were each other's equals.