On her wedding night, the eldest daughter of the Earl of Jing'an's household dies unjustly. Her twin younger sister, Shen Qinghe, assumes her identity and marries into the Marquis's manor. First, her mother-in-law, Madam Liu, makes things difficult for her at every turn; then her cousin, Xiao Lianrou, schemes against her in secret. Her betrothed, Xiao Jin, is even more wicked. Carefully planning each move, she relies on the secret protection of her husband, Xiao Ci, to set clever traps, sow discord among her enemies, and gather evidence of their crimes. From someone everyone can bully to the one controlling the entire game, she gradually drives her enemies into a desperate corner. When the truth finally comes to light and the villains are brought to justice, she reveals her true identity and secures justice for her elder sister. With everything settled, she and the husband who truly cherishes her embark on the rest of their lives together.