After a long mission of exterminating a vampire nest. Ryeowook, the Reseacher of the group, goes shopping for supplies before going back to the Vatican. but as he returns he hears Yesung, a hunter and his 'boyfriend', having with his partner Siwon. As he runs into a forbidden forest, on the outskirts of the town, he gets attacked by a werewolf. But when he is saved by a vampire, and joins a family of orphans, he learns that he is not all who he seems to be. While falling in love with a vampire, and being targeted by many different groups. Who could survive all this?