With a marriage contract, Shen Wuyou, a concubine who is proficient in architecture and engineering, is sent to the Jingan Marquis Mansion, where the sun is declining, to celebrate the death of the terminally ill young Marquis.
After the red makeup faded and the bridal chamber was cold, she realized that this magnificent house was nothing but a golden cage with vicious Feng Shui. The mistress hides a knife in her smile, and the sisters hide their swords in their sweet talk. Even the plants and trees in the courtyard where she lives hide a deadly plot.
Others fight for jewels and favors, but she fights for beams, drops of water, and people's hearts.
Shen Wuyou used the pen as a sword and the drawings as a shield, quietly changing the situation and changing the world. She wants to live, and she wants to live prosperously.
Just when she thought this was just a survival game in the back house, the mysterious prince Xiao Jue wearing a sickly mask unfolded a bigger chess game in front of her. The decline of the Hou Mansion, the secret fighting in the court, and the lost military symbols all point to a conspiracy that can overthrow the dynasty.
He sees her as a chess piece, but she wants to be the one who plays the chess piece.
"The biggest prison in the world is the human heart. And I want to use the rules in my hands to create a world of my own."