Levi is a vampire that's been experimenting on humans, trying to make their blood taste better. No human's blood could satisfy him, until you. He was in the woods, you had a cut from tripping over. The smell filled him with pleasure. So he took you, kept you alive as his feeding bag.

"Ah, Jaz... It's time for me to feed on your blood. Now be a good human and sit still"

Levi approaches your cell, your ankle is chained to the floor.