In order to protect the integrity of the family, Su Qingjia, the legitimate daughter of the Dingbei Hou Mansion, was designed by her father to marry her younger sister into the rival Zhen Xihou Mansion. Her husband Pei Yan hated the Su family deeply because of his mother's violent death ten years ago. On their wedding night, he was publicly humiliated on the grounds of "substitute marriage". Qingjia endured the humiliation and endured the heavy burden of dealing with the inner palace of the Hou Mansion. He had to deal with the provocation of his sister-in-law and the frame-up of the side chamber, and secretly investigated the truth of the old case. Pei Yan gradually realized in repeated confrontations that his wife was different from the rumors, but he was forced to stab her with the sharpest words because of his family mission. When Qingjia finally found out that her mother's early death was related to the Pei family, and Pei Yan also discovered that there was another hidden secret in the murder case, the two redeemed each other in a love-hate relationship, and finally worked together to expose the mastermind behind the scenes and break the centuries-old feud between the two families. The whole drama is based on the main line of "abusive confrontation-undercover investigation-life and death protection-reunion after breaking the mirror", with strong conflicts and high reversals, intertwined with sweetness and abuse.
