Who's afraid of the big bad wolf

I had a job to do, and it came to be the only thing on my mind since that day...that day the wolf killed my grandmother. Something in me snapped and before I knew it I was standing over the bloodied body of a man. A beast. A monster. On that dreadful day I vowed that until the last breath left my body, I would do everything I can to rid the world of those murderers.

Werewolves.