The whole palace is waiting for her to die. She wanted to live and win. She was sent to the palace as a scapegoat by her family, and everyone knew that she was the replacement. The abandoned daughter who entered the palace on behalf of her sister changed her identity three times in the desperate situation of the harem, growing from a manipulated stand-in to a real chess player, and won love and freedom in an extreme game with the only person who saw through her.