Cyrus, a noble vampire from Romania, is the only member of his kind with an immortal soul. After sneaking into China, he falls in love at first sight with a woman from the East. On their wedding night, he prepares for an all-out night of abandon, but before his fangs can sink in, she reaches into his chest and pulls out his heart. When he looks up, his delicate Eastern bride has transformed into someone else entirely: the image of a traditional Chinese ghost officer.
It turns out his bride is anything but delicate. She is the coastal defense captain of the Black Impermanence Division.
He craves the intoxicating taste of her blood, while she hungers for the delicious flavor of his soul.
They both spin grand romantic promises to each other, while secretly calculating how to devour the other.
She has hunted him across China for ten years. Everyone knows that she, Feng Chengying, has set her sights on this illegal immigrant as her prey. Yet when she is in mortal danger, he suddenly appears, takes the blame for her, and saves her from the crisis.
By a twist of fate, she also recovers a lost fragment of her past-life memories. In the tumultuous Republican era, it turns out, they were lovers.
Just as their feelings begin to change, her superiors suddenly order her to enter a political marriage with the Dragon Clan. The man from the clan, Ao Yuan, happens to possess something she desperately needs: an object that can help her fully recover her past-life memories.
She has always put self-interest first, so she readily agrees to the marriage and forcibly sends Cyrus, who has fallen in love with her, out of China. On the ferry leaving the country, Cyrus unexpectedly runs into Ao Yuan. Both men know who the other is, and war is about to break out…