Knightmare Academy

Knightmare Academy, a private boarding school for troubled girls.
AKA - our rich parents can't handle us acting out, so they sent us far away to become someone else's problem.

Alternatively -

Girls start disappearing from the private Knightmare Academy for Wayward Girls.
Seven friends feel like they're being watched.
Are these things connected? Are they next? But also... why them?

It all starts with a nightmare, a woman, and a book.