Lin Shuyue, a top modern legal expert, transmigrates overnight into the Tang Dynasty as the disgraced Crown Princess, confined to the Cold Palace and set to be declared “dead of illness” in three days. The original owner died unjustly, her family was brought down, and her enemies went unpunished. Facing a cutthroat court and a rotten power structure, she casts off her mask of weakness, takes the Tang Code and Commentaries as her weapon, and vows to rebuild order through the law.