After Kim Seokjin's entire family is wiped out by a vampire hunter, paid by one of his father's rival companies to get them out of the way, Jin must put his trust in a less-than-friendly witness protection officer, Kim Namjoon. The two don't exactly get along-and Jin spends most of his time trying to think of ways out of this mess. Being crammed in a tiny apartment with a human who smells like cake when he's surviving off of smuggled bagged blood isn't the most appealing option, either.