Talia Sloane, a modern girl, enters the palace in place of her sickly sister. Bound to a Tyrant Redemption System, she must cure the misogynistic Tyrant, Kaelen Shaw, who tries to kill her upon their first meeting. Talia suppresses his manic episodes, evades the Empress Dowager's and elder sister's plots, warming the emperor's heart. Talia helps Kaelen crush the Empress Dowager's treasonous plot and heals his trauma, transforming from a Noble Lady on death row into the Tyrant's sole Empress.