This drama tells the fantasy romance between vampire lord Aldric and his hardcore fan Zara. Zara accidentally takes her sister's place to marry into the vampire castle, initially aiming to start a "star-chasing" journey, only to discover that the cold and arrogant lord is actually gentle and deeply affectionate. Facing the serial framing of the villain Vex, Zara relies on her mastery of ancient texts and her awakened Holy Spirit bloodline to resolve crises time and again. Amidst conspiracies and protection, the two move towards each other, writing a romantic legend of high-sweetness and major plot twists.