Two families collide when their children fall in love. One mother sacrifices everything before she dies to secure her children's future, while the other ruthlessly abandons her daughter for greed. Caught between ultimate sacrifice and ultimate betrayal, the two leads must survive the destructive secrets of their rival households.

Sim-dan gets bullied everyday in his school, becomes a vampire after an unexpected accident. After accepting this change, he saves a blind person who fell down on a subway track, thanks to his power. His story goes on air on TV news all over the nation, and many people start to call him a ‘Hero’. On the other hand, Sim-dan’s friends start to wonder about his power and dark force, appearing after a long sleep. He is after the girl he loves and people around him.