Baekhyun is a young werewolf man who lives with his family that contains his parents and two younger sisters. He lives a peaceful live with his family, until one day when two men come to their house and gives Baekhyun two choices: to either marry Park Chnayeol, the noble vampire, or let a huge war break out between the vampires and the werewolves.

What will Baekhyun do? Marry a noble vampire, which is usually unthinkable, or let a huge war break out?