When eighteen-year-old Byun Baekhyun heads out to attend the most popular girl's party, he expects to have fun and ignore all the problems he's facing in the university. What he gets, though, is a guy-who-is-actually-a-demon almost killing him inside the washroom. Much less seeing a guy with silver hair slaying the demon with a strange-looking sword. This is Baekhyun's first encounter with a Nightingale, a warrior appointed to protect the cosmos from demonic invasions—and balancing the forces unseen by the human eye. It's also his first meeting with tall and exquisite Chanyeol. Within a day, he is into a world where Angels and Demons exist, when his mother is killed and Baekhyun himself is being watched over by demons. He has a lot of questions that badly needs answers: What do the demons want with him? Why do they keep is being a Darkstalker such a big deal? And most importantly, who is he going to trust when he learns his entire life is nothing but lies? Baekhyun wants to find out . . .

❝Embrace who you are. No matter how much they denied your identity, it runs within your blood.❞