Shen Qingci, the concubine of the Marquis of Yongchang, lost her biological mother when she was young and struggled to survive in the hands of her legitimate mother. A marriage was granted, but the eldest sister escaped from the marriage and was pushed out to marry the sick and frail prince. Everyone thought she would be a widow, but they didn't know that she had already seen every face in this deep house. From the Marquis' Mansion to the Prince's Mansion, from the chess piece to the chess player, she must use her own way to fight her way out of this cannibalistic back house.