In the empire of Suienkoku, the In clan is regarded as the lowest caste and subjected to relentless persecution. Gyokuei, a bright and determined In girl, works as a maid while secretly studying under an elderly scholar. When the emperor decrees the expulsion of all In people, she is driven from her workplace and cut down by pursuing cavalry. As she dies, her hatred focuses on the emperor’s concubine Ryuu Setsuen, whom she blames for the ethnic discrimination. Instead of death, Gyokuei’s soul is cast fifteen years into the past and awakens inside Setsuen’s body.

Setsuen is the emperor’s most cherished consort, revered as a goddess for her political foresight—but in the original timeline she was a manipulative villainess who kept secret lovers, plotted rebellion, and was eventually executed, leading to the enslavement of her entire household and the oppression of the In clan. Gyokuei now occupies Setsuen’s position at a pivotal moment: the emperor is still alive, the In clan has not yet been targeted, and she possesses knowledge of the disastrous future. Determined to prevent that future, she resolves to play the role of “villainess” in order to rewrite history.

The story follows Gyokuei-as-Setsuen as she navigates the treacherous imperial court, balancing the expectations of a cunning consort with her own compassionate instincts. She forms key alliances—most notably with the young general Seika, whose strength and loyalty become vital—while outmaneuvering rival concubines, corrupt officials, and the emperor himself. Notable arcs include her rise to become regent for a child emperor, her use of administrative and military reforms to elevate the In clan’s status, and the gradual dismantling of the network of enemies who originally caused her downfall. The narrative also explores the cost of her choices: the line between righteous scheming and genuine ruthlessness blurs, and she must confront whether she can remain humane while wielding absolute power.

The manga covers the complete arc of Gyokuei’s transformation from a persecuted girl into a formidable ruler who reshapes the fate of an empire, ultimately achieving peace for her people but at a personal price. The series concludes with her legacy secure, though the path is paved with sacrifice and moral complexity.