Yay, a beginning that starts in the middle of action!

I'll be reading the next part.

The summary really caught my interest. A girl with an uncanny knack for breaking mirrors? Had to check it out.

'Dimmed by curtains tightly drawn'
That's a really awkward phrasing. Nothing wrong with saying 'tightly drawn curtains'.

What I really like about this chapter is that you don't try to explain to the reader what's going on. But it's not really confusing either. You have just enough to make me want to find out what happens next. :)