Murong Jiu, the Ninth Young Miss of the Marquis Mansion, bears the weight of her cursed existence—homely and untalented, destined to destroy those around her. Banished to the countryside in her youth, she possesses extraordinary medical abilities that eventually capture the Crown Prince's predatory eye. He milks her talents dry, then tosses her into a dark well to drown. In her final breaths, shattering truth pierces through: she was switched at birth—another woman lives the life that belongs to her while her true family perishes as stepping stones for the Crown Prince's schemes. Reincarnated from death itself, she returns as a force of retribution, making enemies quake with dread. But when her biological family embraces her as their most beloved, her sharp edges dissolve. She transforms from instrument of revenge into cherished treasure. Forced into a hollow marriage with Prince Ling as his substitute consort, she finds herself pregnant with an unsolved mystery. Though she and the Prince seek the child's true father, fate plays its cruel joke: the man from that fateful night remains unknowingly beside her.