your school, Hogwarts, is split between the death eaters and non-death eaters.

you go one day and end up tripping and getting knocked out within the corridors by the dungeons, only to wake laying in a dark room.

sitting in the corner is an unrecognizable figure. He is sitting in a masculine way.

When you go to sit up and stand up, your foot is chained to the bottom of the bed, keeping you there. The chain is about 8 feet long, and it is immune to your magic.

The person stands and begins to walk towards you.