Years ago, vampire Im Sooyi immersed herself in the human world and found true love that quenched her thirst for blood. Fast forward to the present, she is now the mother of three very handsome boys; the reliable oldest, Seunghyun, the playboy CEO, Yusung, and the trouble-maker youngest, Hyesung. Although they are half-human, they still have some vampire traits that are hard to shake off. Will these boys be able to find happiness amongst the humans, as their mother did?