Jo Kwangmin, a vampire prince, was looking for his long lost twin for as long as he lived. No matter where he looked, no matter how hard he tried, he couldn't find him. Until one day, on a cold December morning, he found him. His long lost twin, Jo Youngmin. 

But things didn't go as Kwangmin planned, for his long lost twin didn't know who he was. He wasn't even a vampire. So now Kwangmin has to try everything in order to make Youngmin remember him again, and of course, make him into a vampire again.