Empress Jiang Fu, poisoned to death by the tyrant, is reborn overnight and returns to the night she entered the palace as empress. In her past life, she died a cowardly and tragic death and her child was snatched away; in this life, she turns the tables to reclaim the phoenix seal, transforming overnight from a sickly empress to a toxic empress feared by the entire palace. The mad tyrant Shi Heng, who killed his brother to usurp the throne, married her only to control the Jiang family army, but his emotional defense was cracked by her amidst testing and humiliation. To save the empress suffering from severe poison, the tyrant personally removes his crown and ventures deep into the core's sea of fire to search for medicine. Returning to the palace, a pulse of joy is diagnosed, and Jiang Fu stands atop the phoenix throne: in this life, neither her child nor her love will ever be lost again.