The Marquis Mansion's true daughter Meng Jin is welcomed back to the capital, only to face cold treatment from her family and framed by the fake daughter, finally fleeing to the potter's field on a rainy night and entrusting her last vitality to Yun Tang, who has been trapped in the old place for thirteen years. Yun Tang returns using Meng Jin's identity, and her first step is to return to the Marquis Mansion. Facing biased parents, hypocritical fake daughter, and powerful shelter, she no longer explains or backs down, using evidence as a knife and identity to enter the game, peeling back the truth of Meng Jin's humiliation layer by layer. But the Marquis Mansion's old accounts are just the beginning, and the secrets Yun Tang was trapped with in her past life also resurface with her return.