In a world intertwined with the supernatural, a desperately ill woman's family posts a plea for help online when medical experts declare her condition incurable. Ambrosia, a unique vampire with the ability to traverse both day and night, discovers their plea. Moved by empathy, he offers a risky cure: his own vampiric blood. After an initial hesitation, the family allows the transfusion. The process is agonizing for the woman, who subsequently undergoes a dramatic transformation.

Now a vampire like Ambrosia, she acquires abilities to move in daylight, a rarity among their kind. As they spend time together in Ambrosia's mansion, a deep bond forms between the two, turning into a passionate romance. They explore the world, share tales from their pasts, and support each other in their unique vampiric lives. The story culminates in Ambrosia's realization of contentment, having found a true companion with whom he can share his eternal existence.