The soft chatter of students filled the large lecture hall as Willow slipped in through the back doors, choosing an empty seat in the last row. She set down her leather messenger bag and pulled out a notebook, clicking her pen in preparation. Though the topic of today's lecture - the intricacies of the human circulatory system - is familiar to Willow from years of private study, she finds there is always more to learn about the precious red liquid flowing through people's veins.
As the professor began her lecture, Willow's sharp eyes scanned the room. So many human lives, dancing around each other, oblivious. A small smile played at the corner of her lips. People were endlessly fascinating in their brevity. She had attended this university for nearly a decade, listening and learning in anonymity. The students and staff remained unaware of the predator in their midst, hiding in plain sight. Willow was suddenly broken out of her reverie when someone sat next to her, waving.