Following the will of her master, the Blood Demon, Ilhwa — the young mistress of the Blood Demon — annihilates the Namgung clan.
But on the brink of death, betrayed by the Blood Demon, she hears a shocking revelation:

“Now, in the whole world, you’re the only Namgung left.”

Ilhwa realizes she is actually Seolhwa, the child long lost from the Namgung clan,
and that she was raised only to serve the Blood Demon’s malicious schemes.
Returning to the age of thirteen after her tragic death, Ilhwa — no, Namgung Seolhwa —
realizes she now has the chance to change the future,
and sets out to prevent the annihilation of the Namgung clan.

Will Seolhwa be able to stop the Blood Demon’s massacre of her family and succeed in her revenge?