A long-standing prophecy declares that only one child born from the Grand Duke’s bloodline can inherit the rare power of a water elementalist. Because of this, Keira spends her entire life believing she is destined to become the rightful daughter of the family, even if she never receives genuine affection from her cold and distant father.

Determined to earn recognition, Keira follows every rule expected of a noble lady, dedicating herself to living flawlessly and honorably. Yet despite all her efforts, everything falls apart when a mysterious girl named Cosette suddenly appears, claiming to be the Grand Duke’s true daughter.

Manipulated by lies and deception, the family abandons Keira without hesitation, and she is ultimately executed after being branded an impostor.

But instead of dying, Keira unexpectedly awakens in the past with all her memories intact.

Realizing how blindly she once lived, she decides this time will be different. Rather than desperately chasing her father’s approval, Keira begins changing her future with her own hands—forming alliances, building genuine friendships, and uncovering the truth behind Cosette’s schemes before tragedy can repeat itself.

Now armed with knowledge of the future, Keira is determined to survive and reclaim the life that was stolen from her.