Princess Yongning "died" of illness, and her righteous daughter Qinglan married Dawa. She grew from a chess piece to a chess player in the grassland conspiracy, hoping to instigate a rebellion against the enemy king's prince. The real princess Ruining, who was secretly imprisoned by Grand Master He Qinian, glimpsed a shocking conspiracy under the illusion of gentleness. The two countries are at odds with each other, and the fate of the sisters is intertwined. Between love and family and country, loyalty and betrayal, can they break through the cage and rewrite their fate?