Liu Qingniang, the maid of the Hou Mansion, has a secret love for the childhood sweetheart Xiao Chengyu, the eldest son, but is designed by the mistress to be a pawn to check and balance the eldest son. In the past ten years, Qingniang has been punished for blocking knives for Xiao Chengyu, taking care of the inner house, and being stigmatized. However, Xiao Chengyu had to treat her coldly and even give her away to others in order to protect his family. When the truth is revealed layer by layer - the blood letter written by the mistress before her early death, the farm Xiao Chengyu secretly set up for her, and the key evidence in the family extermination case, the two finally face their true feelings in the face of family overthrow and life-and-death crisis, and they risk their lives to protect each other and reunite.
