Who were you in your previous life?

That's what Kim Minseok wonders when he discovers that his vivid nightmares are actually flashbacks from a distant past. The only person who remembers anything about Minseok during his last fourty-nine lives is an ancient vampire - and also his past lover.

Byun Baekhyun has lived for almost one thousand years infected with the vampire virus and he is constantly drawn to Minseok. As hard as he tries to avoid the pain of losing the one he loves again and again and again, Baekhyun quickly finds out that there's no way for him to escape what's in his heart. Once Minseok realizes that he's tied to the mysterious vampire by fate and that he is absolutely and unconditionally in love, he will stop at nothing until he's Baekhyun's again.

But love is the least of their worries when the riots start. There's a massive group of vampires who want nothing more than to take what they can from the humans and they plan to start an uprising against the vampire royals whose job has been to protect the humans for that last hundreds of years. Their army is growing quickly and they are almost powerful enough to overthrow the monarchy. They just need one ultimate weapon to join their forces: the strongest and oldest vampire... Baekhyun.