On the eve of her grand wedding, Princess Changle Ye Yuan unexpectedly foresees a hellish ending three years later. Fiance Jiang Yu and enemy Lin Yuan'er conspire to seize her military power, ruin her appearance, and degrade her to a concubine, ultimately causing her to die in bitter resentment. She suppresses her towering hatred to play along, using the duo's body-swapping poison scheme to counter-deploy a death trap, scheming step by step to overturn all conspiracies, making the scum man and wicked woman taste the bitter fruit of completely losing their identities and having no defense, and personally guarding the Ye Family Prince's Mansion and a lifetime of glory.