Five years ago, Oh Sehun, while walking home from school was attacked by a group of boys who were his school's notorious bullies. A beautiful baby-faced boy had come to his rescue as he had lain in the ground bleeding from the wounds that had been inflicted on him. With a bright smile and an friendly hand, the boy had helped Sehun home before disappearing without even introducing himself.

That had been when Sehun had been a human and helpless. Now he was no longer human and no longer helpless. He had a goal. The elimination of all werewolves. He was out for blood. He was out to get revenge for his sister...