Cage Game

She is the owner of the "phantom crime" of killing the imperial officials, and he is the king of Jin who has power over the country. Deep in the Black Prison, he set up a cage for her, and she set up an illusion for him. "Be my king's knife and give you freedom and antidote." He handed out arsenic wrapped in honey. She drank the poison with a smile, but her milky white eyes were piercing: "Your Highness, how did you know that you are not my antidote?" When the conspiracy is revealed and the truth emerges, who is the pawn and who is the player in this game?