The Legitimate Daughter Returns: The Marquis's Poisonous Daughter

In her previous life, she was stripped of her title as empress and died after enduring humiliation at the hands of her husband and her younger half-sister. Given a second life, she became a very different person.

Her concubine mother and her scheming younger half-sister laid traps for her at every turn. This time, she would no longer be weak: she fought back fiercely.

The Third Prince gave her his full support. She avenged every wrong with gleeful satisfaction, and was finally close to exacting her revenge, when a mysterious figure began to thwart and frame her.

Who was the mysterious figure behind it all?