Zheng You, the eldest daughter of the Prime Minister's household, died on the eighteenth year of her life, on the wedding day she had looked forward to most. The tea her mother handed her was poisoned, and the Third Prince, who had always cherished her, delivered the final blow. "You're not even a daughter of the Zheng family. What makes you think you deserve to marry me?" Only then did she discover that the Prime Minister's household had raised her for eighteen years for one purpose: to take the place of their real daughter and die in her stead, shielding her from misfortune. But they had no idea that she was not a fake daughter of the Prime Minister's household. She was the Empress's long-lost legitimate princess. Reborn, she reunites with her imperial mother and reclaims her position as princess. She will make everyone who wronged her pay, without exception. "You raised me for eighteen years just to kill me? Well, too bad. My birth mother is the Empress!"