The vampire leader Bastian falls victim to a plot, triggering the Blood‑Bond Curse. By a twist of fate, he has a one‑night stand with Aurora, who is terminally ill. Bastian soon discovers that Aurora can ease his curse‑induced attacks, so he proposes a contractual marriage to her. Overwhelmed by chaotic circumstances and unable even to afford her mother's medical bills, Aurora accepts out of desperation. Living under the same roof, Bastian begins to suspect that Aurora carries the Witch‑Gold bloodline capable of lifting the Blood‑Bond Curse. He also realises she is no ordinary girl, but one blessed with immense hidden power. Eventually, the two unlock their sealed memories, and the wheel of fate finally brings their love — torn apart against their will three hundred years ago — to a happy conclusion.