In the winter of the thirteenth year of Yongxi's reign, a heavy snowstorm closed Beijing.
Shen Qingque, the legitimate daughter of the Duke of Zhenguo, dressed in a wedding dress and married into the Marquis of Jing'an, becoming the bride of Xiao Jinghan, the "sick and frail prince".
Her embroidered handkerchief hides the edge, which is the sharp blade that raises the door; his wheelchair conceals the conspiracy, which is the hidden chess game of the Hou Mansion.
The undercurrent of the house is turbulent, and the struggle for the throne in the court becomes fierce. When the needle and thread on the embroidered handkerchief turn into a knife to break the situation, when the eyes behind the wheelchair condense into the edge of power, this masked couple will carve a way out for themselves in the whirlpool of Hou Men's machinations, and between the knife edge and the brocade, a deep love that no one expected will grow.